This document discusses different grapevine training systems and provides guidelines for choosing a system. It begins by defining vine architecture and how pruning and trellising systems influence canopy growth. It then discusses specific systems like cordon de Royat, Guyot, and vertical shoot positioning (VSP), and compares their effects on yield. Factors that determine yield per vine and hectare are examined. The document provides examples of how canopy manipulation like leaf and lateral removal can influence bunch microclimate and berry composition. Ideal ratios of leaf area to fruit are presented for different systems like VSP, Smart Dyson, and Lyre to achieve quality while maximizing yield.
This thesis evaluates different training systems and rootstocks for 'Alpine' nectarine production in terms of production, labor requirements, and financial efficiency. 'Alpine' nectarines were planted using four training systems (four-leader, two-leader, proleptically trained central leader, and sylleptically trained central leader) on three rootstocks (GF 667, SAPO 778, and Kakamas seedling). Data on yield, fruit size, labor, and light penetration within the canopy were collected. An economic analysis found that according to the internal rate of return, the four-leader system was preferred, but the net present value calculation found the two-leader system was preferred when
[19437714 hort technology] effects of early tree training on macadamia prod...Boonyong Chira
The study assessed the effects of early training of young macadamia trees to a central leader compared to a minimally pruned control. Two cultivars were used, representing spreading and upright growth habits. Training to a central leader reduced cumulative yields per tree over the first 3 years by 16% for the spreading cultivar and 23% for the upright cultivar. The yield reduction was correlated with fewer racemes per tree. Early training of the upright cultivar appeared to improve storm resistance, but no effect was seen in the spreading cultivar. The yield penalty suggests the industry should reconsider recommending early central leader training of young trees.
High tunnel apricot_production_in_frost-prone_nortBoonyong Chira
Late frost is a major challenge for fruit production in northern New Mexico, where apricot trees in open fields produced no harvest from 2001-2014. The study tested growing apricots in high tunnels, which provide frost protection. In 2015, relatively high yields were obtained from all cultivars grown in high tunnels, while no fruit was harvested from open field plantings. However, supplemental heating was needed to protect blossoms, as temperatures below 10°F in late February/early March killed flower buds in 2017-2018, preventing crops those years. High tunnel apricot production provides yields, but reliable crops depend on weather and require heating, making it risky in northern New Mexico.
Ppt fruit-apple-thinning-robinson-cornell-2014-engUC Davis
This document discusses crop load management techniques for apple orchards to maximize economic returns. It describes how fruit size and yield are counterbalanced by thinning, and how crop value per acre depends on both factors. The optimum crop load is identified as the point where crop value is maximized. Precision techniques are presented for adjusting bud load, applying multiple thinner applications, and hand thinning to precisely control crop load. Weather impacts on thinning response are also reviewed.
The article describes a new apple and pear training system called Guyot training. In Guyot training, the tree stem is laid horizontally to form a cordon 0.5 meters above the ground, with vertical branches growing upwards. This creates a narrow canopy around 0.3-0.4 meters wide. Yields in young Guyot trees are around 8-12 kg per apple tree in the second year. Mature Guyot orchards can yield 50-85 tons per hectare. The Guyot system allows for narrow tree spacing and may enable mechanization, precision horticulture, and use of anti-hail nets compared to traditional spindle training. However, it requires significant labor during the initial training phase to shape the
This document discusses analyzing fruit tree architecture and its implications for tree management and fruit production. It begins by introducing architectural analysis concepts used to qualitatively and quantitatively study fruit tree topology, growth, branching patterns, flowering location, and form. The analysis aims to define architectural models of different fruit tree species. The document then explores how tree architecture influences initial choices and training of young and adult trees, and how it impacts fruit load effects, thinning practices, and tree training procedures. The goal is to develop training concepts that optimize management systems at both the orchard and tree scales based on knowledge of growth and flowering processes within tree canopies.
Presentation about the importance of canopy management & the practices followed in the process of canopy management.
Presentation for academic purposes.
This thesis evaluates different training systems and rootstocks for 'Alpine' nectarine production in terms of production, labor requirements, and financial efficiency. 'Alpine' nectarines were planted using four training systems (four-leader, two-leader, proleptically trained central leader, and sylleptically trained central leader) on three rootstocks (GF 667, SAPO 778, and Kakamas seedling). Data on yield, fruit size, labor, and light penetration within the canopy were collected. An economic analysis found that according to the internal rate of return, the four-leader system was preferred, but the net present value calculation found the two-leader system was preferred when
[19437714 hort technology] effects of early tree training on macadamia prod...Boonyong Chira
The study assessed the effects of early training of young macadamia trees to a central leader compared to a minimally pruned control. Two cultivars were used, representing spreading and upright growth habits. Training to a central leader reduced cumulative yields per tree over the first 3 years by 16% for the spreading cultivar and 23% for the upright cultivar. The yield reduction was correlated with fewer racemes per tree. Early training of the upright cultivar appeared to improve storm resistance, but no effect was seen in the spreading cultivar. The yield penalty suggests the industry should reconsider recommending early central leader training of young trees.
High tunnel apricot_production_in_frost-prone_nortBoonyong Chira
Late frost is a major challenge for fruit production in northern New Mexico, where apricot trees in open fields produced no harvest from 2001-2014. The study tested growing apricots in high tunnels, which provide frost protection. In 2015, relatively high yields were obtained from all cultivars grown in high tunnels, while no fruit was harvested from open field plantings. However, supplemental heating was needed to protect blossoms, as temperatures below 10°F in late February/early March killed flower buds in 2017-2018, preventing crops those years. High tunnel apricot production provides yields, but reliable crops depend on weather and require heating, making it risky in northern New Mexico.
Ppt fruit-apple-thinning-robinson-cornell-2014-engUC Davis
This document discusses crop load management techniques for apple orchards to maximize economic returns. It describes how fruit size and yield are counterbalanced by thinning, and how crop value per acre depends on both factors. The optimum crop load is identified as the point where crop value is maximized. Precision techniques are presented for adjusting bud load, applying multiple thinner applications, and hand thinning to precisely control crop load. Weather impacts on thinning response are also reviewed.
The article describes a new apple and pear training system called Guyot training. In Guyot training, the tree stem is laid horizontally to form a cordon 0.5 meters above the ground, with vertical branches growing upwards. This creates a narrow canopy around 0.3-0.4 meters wide. Yields in young Guyot trees are around 8-12 kg per apple tree in the second year. Mature Guyot orchards can yield 50-85 tons per hectare. The Guyot system allows for narrow tree spacing and may enable mechanization, precision horticulture, and use of anti-hail nets compared to traditional spindle training. However, it requires significant labor during the initial training phase to shape the
This document discusses analyzing fruit tree architecture and its implications for tree management and fruit production. It begins by introducing architectural analysis concepts used to qualitatively and quantitatively study fruit tree topology, growth, branching patterns, flowering location, and form. The analysis aims to define architectural models of different fruit tree species. The document then explores how tree architecture influences initial choices and training of young and adult trees, and how it impacts fruit load effects, thinning practices, and tree training procedures. The goal is to develop training concepts that optimize management systems at both the orchard and tree scales based on knowledge of growth and flowering processes within tree canopies.
Presentation about the importance of canopy management & the practices followed in the process of canopy management.
Presentation for academic purposes.
High density orcharding in fruit crops.Mahtab Rashid
This document discusses high density orcharding techniques for fruit crops. High density orcharding involves planting fruit trees or plants at closer spacing than traditional methods to increase yields. Key aspects of high density orcharding include using dwarfing rootstocks, specific training and pruning methods, and growth regulators to control vegetative growth and maximize productivity per plant. Examples show yields can increase by 200-250% using high density spacing for crops like mango, citrus, banana and guava. Studies on apple orcharding found the highest cumulative yields and leaf area index using a spacing of 2.5m x 2.5m. Severe pruning in alternate rows every three years is proposed as a strategy for high density orchards.
- Apple is one of the most important temperate fruits originating in the Middle East over 4000 years ago. It is now widely cultivated globally with China as the largest producer.
- In India, apple cultivation is concentrated in Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Arunachal Pradesh and Nagaland. Himachal Pradesh accounts for about 90% of India's total apple production.
- Apples are a good source of nutrients and contain vitamins, minerals and fiber. They are consumed fresh but also used to make juices, jellies, wine and other products. Proper harvesting, post-harvest handling and storage help maintain quality for up to 8 months.
Silvicultural systems are methods of harvesting, regenerating, and tending forests. The two main types are high forest systems and coppice systems. High forest systems regenerate from seedlings and have long rotations, while coppice systems regenerate from stumps and have short rotations. Some common high forest systems include clearfelling, seed tree, shelterwood, and selection systems. Clearfelling removes the entire mature crop at once, while shelterwood and seed tree methods remove trees gradually to allow for natural regeneration under shelter. Selection systems involve uneven-aged management with continuous regeneration throughout the forest area.
This document summarizes research on dwarfing fruit plants through the use of dwarfing rootstocks and other techniques. It discusses the principles and physiology of dwarfism, and various methods to achieve dwarfism including dwarfing rootstocks, bioregulators, incompatible scions, viral infection, pruning and training, and genetic engineering. It also presents findings from research studies on the effects of different rootstocks on tree growth and yield of various fruit crops such as apple, mango, and citrus. The document provides detailed information on dwarfing mechanisms and strategies to produce compact dwarf trees with desirable horticultural characteristics.
nursery production of fruit crops: definition of rootstocks and scion, types ...arunBhardwaj55
This document discusses rootstocks and their characteristics for fruit crops. It defines a rootstock as the lower portion of a grafted plant that develops into the root system, and a scion as the part grafted onto the rootstock. There are two main types of rootstocks - seedling rootstocks developed from seeds, and clonal rootstocks propagated vegetatively. An ideal rootstock is described as one that is compatible with scions, adapted to the local environment, resistant to diseases and pests, tolerant of soil conditions, and positively influences scion performance and quality.
Ppt fruit-apple-soil-health-merwin-cornell-2014-engUC Davis
This document summarizes the findings of an 18-year study on the effects of different groundcover management systems (GMS) on orchard soil health and apple tree growth in New York. The study found that mulch and post-emergence herbicide GMS maintained the most effective and sustainable soil conditions, resulting in higher tree growth and yields over time. Soil fertility, microbial activity, and nutrient retention were highest under mulch. Bare soil from pre-emergence herbicides increased erosion and leaching. GMS also influenced long-term root-zone microbial communities. The document also discusses apple replant disease and strategies for mitigating its impacts, such as rootstock selection, soil amendments, drainage improvements, and
This document describes a new grafting method for propagating seedless watermelon plants. The method involves grafting cuttings from seedless watermelon scions onto rootstocks of different gourd varieties, including bottle gourd, pumpkin, and squash. The grafted plants showed increased growth, yields, fruit characteristics, and sugar content compared to seedless watermelon grown without grafting. The new grafting technique could help reduce the high costs of producing seedless watermelon in Egypt by providing a means of asexual propagation to minimize the need for expensive hybrid seeds.
Normal forest – growing stock and incrementiqbalforestry
This document discusses the concept of a normal forest, which is defined as an ideally constituted forest that can sustain yields indefinitely through balanced age distributions, growing stock, and annual increment removal. A normal forest is characterized by: [1] a normal series of age classes distributed appropriately across the forest; [2] a maximum normal increment given the forest type and site conditions; and [3] a normal growing stock volume indicated by yield tables. The concept of a normal forest provides an ideal standard for comparison to evaluate the condition of an existing forest and ensure maximum sustained benefits from management.
different grafting methods in minor fruit crops urvashiboricha
This document discusses various grafting methods used in propagation of different fruit crops like persimmon, aonla, avocado, rambutan, passionfruit, jamun, woodapple and jackfruit. For persimmon, tongue and wedge grafting using tools in April gave highest results. For aonla, softwood grafting in January had highest success. Budding and grafting are used for avocado propagation. For passionfruit, grafting in June using 25cm scion length at 10cm height gave maximum success. For jamun, softwood grafting in March was most successful. For woodapple, grafting on 8 month old rootstock performed best. For jackfruit, epicotyl
Rejuvenation techniques like pruning, manuring, thinning shoots, and controlling pests and diseases can help restore productivity and vitality to old orchards. Top working methods such as cleft grafting and wedge grafting involve grafting desirable scions or shoots onto the branches or trunks of existing trees to convert them to more profitable varieties. Bridge grafting can repair tree injuries by grafting scions between the damaged section and healthy crown to restore nutrient transport.
This document describes the comparison-tree method for selecting superior trees for breeding programs. The method involves comparing candidate trees to nearby comparison trees of similar age and site conditions to account for environmental influences. If the candidate tree is superior to the comparison trees for traits of interest like growth, form, or disease resistance, it is designated as a plus tree suitable for the breeding program. Guidelines are provided for selecting stands and individual trees to identify the most genetically superior specimens while maintaining genetic diversity.
The document summarizes the development of new apple rootstocks through a breeding program. It discusses:
- The program was initiated in 1967 by Drs. Cummins and Aldwinckle at Cornell University to develop disease resistant and high yielding rootstocks.
- Over 2,500 new rootstocks are currently in development through breeding and selection. Traits of focus include disease resistance, drought tolerance, cold tolerance and yield efficiency.
- Rootstock development involves multiple stages from parent selection and crossing, to disease screening, field trials and commercial production. Molecular tools are now used to aid selection.
- International collaboration has expanded apple rootstock breeding programs globally. Over 100 new rootstocks have been developed and distributed
This document discusses various silvicultural systems and their characteristics. It begins with an introduction to silviculture and silvics, and defines silvicultural systems as methods for harvesting, regenerating, and tending forest crops.
The document then classifies silvicultural systems into two main types: high forest systems and coppice systems. High forest systems involve seedling regeneration through natural or artificial means, with long rotations. These are further divided into clear felling, shelterwood, and accessory systems.
Clear felling systems are described in detail, including variations in removal of the mature crop. Regeneration can be achieved naturally from seed stored on-site, seed brought from outside, or advanced growth retained on
This document discusses propagation of plants through grafting and budding. It describes reasons for using grafting and budding such as propagating plants that do not root easily from cuttings, changing cultivars, and repairing damaged plants. Key terms used in grafting and budding like scion, stock, and callus are defined. Factors that affect the success of grafting and budding are discussed, including the appropriate time of year, compatibility of the stock and scion, temperature, age of plant parts used, and care of grafted plants. Various grafting and budding methods are described along with tools and materials needed and handling of scion material.
Nursery types, Structure, Components, Planning and Lay out of NurseryParmarManishkumarNar
A nursery is a place, where seedling, saplings, trees, shrubs, and other plant materials are grown and maintained until they are placed in a permanent place.
The document provides information on key elements of nursery management, including planning the nursery, crop development, and propagation. It discusses selecting an appropriate site and layout for the nursery. The three phases of crop development - establishment, rapid growth, and hardening - are outlined. Different structures used for plant propagation, like greenhouses and shade houses, are described. The importance of planning crops and developing propagation protocols is emphasized. Hardening plants before field planting to prepare them for stress is also highlighted.
The document summarizes a study on collecting seeds for a bottomland hardwood reforestation project on state land in Wisconsin. Seeds of swamp white oak and hackberry were collected locally at a lower cost than purchasing seeds. A total of $533 was spent on fuel and labor for seed collection. While seed collection has benefits like promoting genetic adaptability, purchasing seeds can be similarly priced and introduces more genetic variation. Better seed collection methods could increase efficiency and lower costs.
This document discusses research advances in grafting and propagation techniques for vegetables. It begins by explaining what grafting is and its benefits, such as improved yield, stress tolerance, and production in non-traditional areas. Various grafting methods are described, and case studies of grafting for crops like tomato, cucumber, and cucurbit vegetables in India are provided. The history and current status of vegetable grafting are reviewed. The document also discusses specific benefits like increased resistance to biotic and abiotic stresses, improved growth, nutrient uptake and yield, and enhanced fruit quality.
Row Cover Vegetable Production Techniques; Gardening Guidebook for New Mexico ~ New Mexico State University ~ For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110
Effect of Varying Rate of Leaf Defoliation on Maize Growth, Development and ...Scientific Review SR
Pot trial was conducted at the Faculty of Agriculture, Kogi State University Anyigba, within the
southern Guinea savanna agro ecological zone of Nigeria, with daily temperature range between 250C - 350C.
The experiment, a Randomized Complete Block Design (RCBD) with eight treatments (defoliation at 25%
above the ear, 25% under the ear, 50% above the ear, 50% under the ear, 75% above the ear, 75% under the
ear, 100% defoliation and no defoliation as control) was replicated four times. Treatment was imposed at ear
initiation. Growth and yield parameters collected were: number of leaves per plant, leaf area, plant height, stem
girth, days to ear initiation, number of cobs/plant, days to crop maturity, cob weight, cob length, seed rows per
cob, 100-seed weight as well as total cob yield/ha. All data collected were subjected to analysis of variance
(ANOVA) and New Duncan Multiple Range Test (NDMRT) was used to estimate the differences among
significant means at 5% level of probability. Prior to imposition of the treatment, anal yzed results indicate no
significant differences between number of leaves at 2, 4 and 6 WAS, as well as plant heights and stem girth at
2, 4, 6, 8 and 10 WAS. However there were significant differences between leaf areas at 4 and 6 WAS. In
addition, there were significant effects of defoliation on cob length and dry cob weight with the highest cob
weight obtained in 25% defoliation carried out above the ear. In addition, there were significant differences in
the number of rows per cob and grain yield per ha with 0% defoliation giving the highest result while the least
was in 100% defoliation. Generally, it was observed that defoliation at any rate and position influenced maize
yield, notwithstanding that the treatment was imposed at cob initiation, an indication that harvest of solar
radiation post cob initiation plays important role on eventual maize yield
Finding a sustainable solution to the problem of climate change is the first step to reduce food insecurity and malnutrition in developing countries. In Côte d’Ivoire the oilseed Citrullus lanatus constitutes a source of income for farmers. The lack of knowledge on the suitable sowing dates of this plant engenders it low production. Thus to resolve this problem, some field trial were carried out in Gbokora (Daloa). An experimental design with three blocs randomized was set up. Experimentation consisted to realize a sowing during two growing seasons: season 1 (S1) and season (S2). For each season five sowing dates separated with two weeks were realized: Early 1 (E1), Early 2 (E2), Middle (M), Later 1 (L1) and Later 2 (L2). It emerges from this study that to improve the yield of this plant, the crop should be grown during the first season. In addition, planting must be done between mid-March and the beginning of April. This period corresponds to the beginning of the rainy season in the study area. However, if the farmers wish to produce the plant in the second growing season, they will have to wait until the beginning of August, which corresponds to the short rainy season.
High density orcharding in fruit crops.Mahtab Rashid
This document discusses high density orcharding techniques for fruit crops. High density orcharding involves planting fruit trees or plants at closer spacing than traditional methods to increase yields. Key aspects of high density orcharding include using dwarfing rootstocks, specific training and pruning methods, and growth regulators to control vegetative growth and maximize productivity per plant. Examples show yields can increase by 200-250% using high density spacing for crops like mango, citrus, banana and guava. Studies on apple orcharding found the highest cumulative yields and leaf area index using a spacing of 2.5m x 2.5m. Severe pruning in alternate rows every three years is proposed as a strategy for high density orchards.
- Apple is one of the most important temperate fruits originating in the Middle East over 4000 years ago. It is now widely cultivated globally with China as the largest producer.
- In India, apple cultivation is concentrated in Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Arunachal Pradesh and Nagaland. Himachal Pradesh accounts for about 90% of India's total apple production.
- Apples are a good source of nutrients and contain vitamins, minerals and fiber. They are consumed fresh but also used to make juices, jellies, wine and other products. Proper harvesting, post-harvest handling and storage help maintain quality for up to 8 months.
Silvicultural systems are methods of harvesting, regenerating, and tending forests. The two main types are high forest systems and coppice systems. High forest systems regenerate from seedlings and have long rotations, while coppice systems regenerate from stumps and have short rotations. Some common high forest systems include clearfelling, seed tree, shelterwood, and selection systems. Clearfelling removes the entire mature crop at once, while shelterwood and seed tree methods remove trees gradually to allow for natural regeneration under shelter. Selection systems involve uneven-aged management with continuous regeneration throughout the forest area.
This document summarizes research on dwarfing fruit plants through the use of dwarfing rootstocks and other techniques. It discusses the principles and physiology of dwarfism, and various methods to achieve dwarfism including dwarfing rootstocks, bioregulators, incompatible scions, viral infection, pruning and training, and genetic engineering. It also presents findings from research studies on the effects of different rootstocks on tree growth and yield of various fruit crops such as apple, mango, and citrus. The document provides detailed information on dwarfing mechanisms and strategies to produce compact dwarf trees with desirable horticultural characteristics.
nursery production of fruit crops: definition of rootstocks and scion, types ...arunBhardwaj55
This document discusses rootstocks and their characteristics for fruit crops. It defines a rootstock as the lower portion of a grafted plant that develops into the root system, and a scion as the part grafted onto the rootstock. There are two main types of rootstocks - seedling rootstocks developed from seeds, and clonal rootstocks propagated vegetatively. An ideal rootstock is described as one that is compatible with scions, adapted to the local environment, resistant to diseases and pests, tolerant of soil conditions, and positively influences scion performance and quality.
Ppt fruit-apple-soil-health-merwin-cornell-2014-engUC Davis
This document summarizes the findings of an 18-year study on the effects of different groundcover management systems (GMS) on orchard soil health and apple tree growth in New York. The study found that mulch and post-emergence herbicide GMS maintained the most effective and sustainable soil conditions, resulting in higher tree growth and yields over time. Soil fertility, microbial activity, and nutrient retention were highest under mulch. Bare soil from pre-emergence herbicides increased erosion and leaching. GMS also influenced long-term root-zone microbial communities. The document also discusses apple replant disease and strategies for mitigating its impacts, such as rootstock selection, soil amendments, drainage improvements, and
This document describes a new grafting method for propagating seedless watermelon plants. The method involves grafting cuttings from seedless watermelon scions onto rootstocks of different gourd varieties, including bottle gourd, pumpkin, and squash. The grafted plants showed increased growth, yields, fruit characteristics, and sugar content compared to seedless watermelon grown without grafting. The new grafting technique could help reduce the high costs of producing seedless watermelon in Egypt by providing a means of asexual propagation to minimize the need for expensive hybrid seeds.
Normal forest – growing stock and incrementiqbalforestry
This document discusses the concept of a normal forest, which is defined as an ideally constituted forest that can sustain yields indefinitely through balanced age distributions, growing stock, and annual increment removal. A normal forest is characterized by: [1] a normal series of age classes distributed appropriately across the forest; [2] a maximum normal increment given the forest type and site conditions; and [3] a normal growing stock volume indicated by yield tables. The concept of a normal forest provides an ideal standard for comparison to evaluate the condition of an existing forest and ensure maximum sustained benefits from management.
different grafting methods in minor fruit crops urvashiboricha
This document discusses various grafting methods used in propagation of different fruit crops like persimmon, aonla, avocado, rambutan, passionfruit, jamun, woodapple and jackfruit. For persimmon, tongue and wedge grafting using tools in April gave highest results. For aonla, softwood grafting in January had highest success. Budding and grafting are used for avocado propagation. For passionfruit, grafting in June using 25cm scion length at 10cm height gave maximum success. For jamun, softwood grafting in March was most successful. For woodapple, grafting on 8 month old rootstock performed best. For jackfruit, epicotyl
Rejuvenation techniques like pruning, manuring, thinning shoots, and controlling pests and diseases can help restore productivity and vitality to old orchards. Top working methods such as cleft grafting and wedge grafting involve grafting desirable scions or shoots onto the branches or trunks of existing trees to convert them to more profitable varieties. Bridge grafting can repair tree injuries by grafting scions between the damaged section and healthy crown to restore nutrient transport.
This document describes the comparison-tree method for selecting superior trees for breeding programs. The method involves comparing candidate trees to nearby comparison trees of similar age and site conditions to account for environmental influences. If the candidate tree is superior to the comparison trees for traits of interest like growth, form, or disease resistance, it is designated as a plus tree suitable for the breeding program. Guidelines are provided for selecting stands and individual trees to identify the most genetically superior specimens while maintaining genetic diversity.
The document summarizes the development of new apple rootstocks through a breeding program. It discusses:
- The program was initiated in 1967 by Drs. Cummins and Aldwinckle at Cornell University to develop disease resistant and high yielding rootstocks.
- Over 2,500 new rootstocks are currently in development through breeding and selection. Traits of focus include disease resistance, drought tolerance, cold tolerance and yield efficiency.
- Rootstock development involves multiple stages from parent selection and crossing, to disease screening, field trials and commercial production. Molecular tools are now used to aid selection.
- International collaboration has expanded apple rootstock breeding programs globally. Over 100 new rootstocks have been developed and distributed
This document discusses various silvicultural systems and their characteristics. It begins with an introduction to silviculture and silvics, and defines silvicultural systems as methods for harvesting, regenerating, and tending forest crops.
The document then classifies silvicultural systems into two main types: high forest systems and coppice systems. High forest systems involve seedling regeneration through natural or artificial means, with long rotations. These are further divided into clear felling, shelterwood, and accessory systems.
Clear felling systems are described in detail, including variations in removal of the mature crop. Regeneration can be achieved naturally from seed stored on-site, seed brought from outside, or advanced growth retained on
This document discusses propagation of plants through grafting and budding. It describes reasons for using grafting and budding such as propagating plants that do not root easily from cuttings, changing cultivars, and repairing damaged plants. Key terms used in grafting and budding like scion, stock, and callus are defined. Factors that affect the success of grafting and budding are discussed, including the appropriate time of year, compatibility of the stock and scion, temperature, age of plant parts used, and care of grafted plants. Various grafting and budding methods are described along with tools and materials needed and handling of scion material.
Nursery types, Structure, Components, Planning and Lay out of NurseryParmarManishkumarNar
A nursery is a place, where seedling, saplings, trees, shrubs, and other plant materials are grown and maintained until they are placed in a permanent place.
The document provides information on key elements of nursery management, including planning the nursery, crop development, and propagation. It discusses selecting an appropriate site and layout for the nursery. The three phases of crop development - establishment, rapid growth, and hardening - are outlined. Different structures used for plant propagation, like greenhouses and shade houses, are described. The importance of planning crops and developing propagation protocols is emphasized. Hardening plants before field planting to prepare them for stress is also highlighted.
The document summarizes a study on collecting seeds for a bottomland hardwood reforestation project on state land in Wisconsin. Seeds of swamp white oak and hackberry were collected locally at a lower cost than purchasing seeds. A total of $533 was spent on fuel and labor for seed collection. While seed collection has benefits like promoting genetic adaptability, purchasing seeds can be similarly priced and introduces more genetic variation. Better seed collection methods could increase efficiency and lower costs.
This document discusses research advances in grafting and propagation techniques for vegetables. It begins by explaining what grafting is and its benefits, such as improved yield, stress tolerance, and production in non-traditional areas. Various grafting methods are described, and case studies of grafting for crops like tomato, cucumber, and cucurbit vegetables in India are provided. The history and current status of vegetable grafting are reviewed. The document also discusses specific benefits like increased resistance to biotic and abiotic stresses, improved growth, nutrient uptake and yield, and enhanced fruit quality.
Row Cover Vegetable Production Techniques; Gardening Guidebook for New Mexico ~ New Mexico State University ~ For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica
http://scribd.com/doc/239850233
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110
Effect of Varying Rate of Leaf Defoliation on Maize Growth, Development and ...Scientific Review SR
Pot trial was conducted at the Faculty of Agriculture, Kogi State University Anyigba, within the
southern Guinea savanna agro ecological zone of Nigeria, with daily temperature range between 250C - 350C.
The experiment, a Randomized Complete Block Design (RCBD) with eight treatments (defoliation at 25%
above the ear, 25% under the ear, 50% above the ear, 50% under the ear, 75% above the ear, 75% under the
ear, 100% defoliation and no defoliation as control) was replicated four times. Treatment was imposed at ear
initiation. Growth and yield parameters collected were: number of leaves per plant, leaf area, plant height, stem
girth, days to ear initiation, number of cobs/plant, days to crop maturity, cob weight, cob length, seed rows per
cob, 100-seed weight as well as total cob yield/ha. All data collected were subjected to analysis of variance
(ANOVA) and New Duncan Multiple Range Test (NDMRT) was used to estimate the differences among
significant means at 5% level of probability. Prior to imposition of the treatment, anal yzed results indicate no
significant differences between number of leaves at 2, 4 and 6 WAS, as well as plant heights and stem girth at
2, 4, 6, 8 and 10 WAS. However there were significant differences between leaf areas at 4 and 6 WAS. In
addition, there were significant effects of defoliation on cob length and dry cob weight with the highest cob
weight obtained in 25% defoliation carried out above the ear. In addition, there were significant differences in
the number of rows per cob and grain yield per ha with 0% defoliation giving the highest result while the least
was in 100% defoliation. Generally, it was observed that defoliation at any rate and position influenced maize
yield, notwithstanding that the treatment was imposed at cob initiation, an indication that harvest of solar
radiation post cob initiation plays important role on eventual maize yield
Finding a sustainable solution to the problem of climate change is the first step to reduce food insecurity and malnutrition in developing countries. In Côte d’Ivoire the oilseed Citrullus lanatus constitutes a source of income for farmers. The lack of knowledge on the suitable sowing dates of this plant engenders it low production. Thus to resolve this problem, some field trial were carried out in Gbokora (Daloa). An experimental design with three blocs randomized was set up. Experimentation consisted to realize a sowing during two growing seasons: season 1 (S1) and season (S2). For each season five sowing dates separated with two weeks were realized: Early 1 (E1), Early 2 (E2), Middle (M), Later 1 (L1) and Later 2 (L2). It emerges from this study that to improve the yield of this plant, the crop should be grown during the first season. In addition, planting must be done between mid-March and the beginning of April. This period corresponds to the beginning of the rainy season in the study area. However, if the farmers wish to produce the plant in the second growing season, they will have to wait until the beginning of August, which corresponds to the short rainy season.
1) Fruit trees can be grown in a variety of shapes, including tall trees and fruit walls which are low and narrow. While tall trees may better utilize land, fruit walls have advantages for management and mechanization.
2) Fruit walls that are short and thin allow all orchard tasks to be done safely from the ground without machinery. They also have more uniform fruit quality and allow for various mechanized practices.
3) Techniques like using multiple leaders, summer pruning, and pruning after harvest can help form and maintain a fruit wall by limiting tree height and width.
Smart viticulture practices such as efficient use of rootstocks, canopy management, and bud testing can help produce higher quality grapes by balancing the vine, improving light harvesting, and minimizing stresses. These practices aim to close the gap between potential and actual yields impacted by drought, salinity, and climate variation. Adopting techniques enabled by artificial intelligence and digital platforms can further help combat biotic and abiotic stresses and sustain grape production under changing climatic conditions.
Jean-Pierre Privé discussed season extension techniques for raspberry production in the Maritimes at the 2013 ACORN Conference. He compared growing conditions in British Columbia and the Maritimes, noting that while BC has a more moderate climate, the limiting factors for raspberry growth are late season cold in BC and rain in the Maritimes. He emphasized using protective structures like tunnels and row covers, adjusting cultural practices, and selecting cultivars suited to the local climate in order to offset these limitations and extend the growing season. Throughout his talk, Jean-Pierre stressed the importance of experimentation to determine the best techniques and practices for individual farms.
Effects of a Composite Endomycorrhizal Inoculum on Olive Cuttings under the G...IJEAB
This study was carried out in a nursery to evaluate the impact of mycorrhizal fungi on the cutting’s root growth, and root colonization of a Moroccan olive variety ‘Picholine Marocaine’ under greenhouse conditions during 2 years of cultivation. The results revealed that the inoculation with a composite inoculum of arbuscular mycorrhizal fungi (AMF) stimulated an early root formation and high development of vegetative shoots in inoculated cuttings respectively, 35 days (50 days in the control plots) and 40 days (60 days in the control plots) after their culture. The progressive establishment of mycorrhizal symbiosis in the roots of the inoculated plants showed that the root and vegetative masses were respectively 24 g and 19.5 g two years after inoculation. The average height and the leave’s number of the inoculated plants relative to the control were respectively s 42/ 12 cm and 145/12. The newly formed roots were mycorrhizal and present different structures characteristic of AMF: arbuscules, vesicles, hyphae and spores, whose frequency and intensity reached 90% and 75% two years after cuttings cultivation. The arbuscular and vesicular contents and the number of spores were 67%, 96% and 212 spores/ 100 g of soil respectively. The fourteen species of mycorrhizal fungi isolated from the rhizosphere belong to 4 genera (Glomus, Acaulospora, Gigaspora, and Scutellospora) and three families (Glomaceae, Acaulosporaceae and Gigasporacea).The Glomus genus was the most dominant (65%) followed by the Gigaspora genus (22%). Glomus intraradices, Gigaspora sp.2, Glomus versiformes are the most abundant species, their frequency of occurrence are respectively 30%, 21% and 16%.
Simulation models of agricultural systems, when coupled with appropriate
data sources, have a great potential for bringing agricultural research and development into the age of information technology.
Crop modeling involves using simplified quantitative representations to describe key variables that control crop growth systems. Fruit tree crop models now focus on carbon-based productivity and were facilitated by advances in computing. Models can predict phenology, climate effects, and stress responses. Developing accurate models requires understanding physiological processes, extensive data, and addressing gaps like root growth patterns. Models combine process-based approaches simulating organ development and biomass partitioning with empirical geometric models of plant architecture. Existing fruit crop models include Hi-SAFE for tree-crop interactions and Yield-SAFE for apples. Crop modeling provides knowledge on fruit tree responses to practices that help optimize yield for export.
HIGH-THROUGHPUT PHENOTYPING METHODS FOR ECONOMIC TRAITS and DESIGNER PLANT TY...Komal Kute
A growing world population is expected to cause a "perfect storm" of food, feed, and biofuel. Under the climate change scenario, it is a challenge for agricultural scientists to ensure food and nutritional security for an ever-increasing population with limited and rapidly depleting resources. However, researchers are now observing that conventional breeding methods will not be sufficient to meet projected future demands for foods. To overcome these constraints, plant breeding has evolved over the past two decades towards a much closer integration of high-throughput phenotyping (HTP) tools and technologies.
The "phenotyping revolution" targets extremely precise and accurate measurements of very specific traits in large populations in the field. Sorghum breeding is not new to this advancement, which obviously implies significant shifts in the breeding programs. First, it indicates breeders integrate trait assessment with traditional yield and agronomic evaluation, emphasising that breeding programmes are opened up to new or other disciplines. It additionally requires that these new or other disciplines think about and conceptualise their own actions and orientations from the perspective of how they may fit into a breeding methodology. In this instance, the four primary sorghum breeding domains—staying green and transpiration limitation under high vapour pressure deficit (VPD); nodal root angle and depth; grain mineral content (Fe, Zn); and grain and stover quality traits—are tightly correlated with HTP. These ongoing initiatives focus on value of the particular trait and why it is considered by breeders; how it is measured with HTP approaches (method, throughput, cost, simplicity) and finally, how these traits are currently being embedded in the breeding program. Through various research, it became evident there are several other avenues of technology that, although not yet routinely implemented, could bring about a major benefit to the breeding programme’s endeavour to increase the rate of genetic gains. Here, we discuss the use of drone imaging for yield trial quality control and pinpoint plot heterogeneity, the integration of quality analysis into the assessment of agronomic traits in the field, and the use of X-ray spectroscopy to assess grain or crop architecture traits.
A study was carried out on plant density at the experimental field of the Institute of Agricultural Research for Development (IRAD) Nkolbisson, Yaoundé to determine the appropriate spacing to improve rainfed rice production in the bimodal rainfall forest zone of Cameroon. The experiment was conducted during the main cropping seasons of 2017 and 2018. The planting spacing used were 15cm x 15cm, 20cm x 20cm, 25cm x 25cm and 30cm x 30cm giving the plant populations of 444444, 250000, 160,000 and 111,111 plants / ha respectively using two varieties (Nerica 3 and Nerica 8). The experiment was laid out in a randomized complete block design with three replications. Significant differences were observed in the growth and yield across the years. Treatments were highly significant concerning the number of days to the appearance of the first flower, the number of days to 50% flowering, and the number of days to 50 % maturity. Plants were taller with more tillers and gave higher yields in 2017 than those of 2018. The spacing significantly affected the plant height, number of tillers, and panicle length for both varieties. The interaction of spacing and variety was significant for the number of tillers per m2 and the number of seeds per panicle, however, it was not for the weight of 1000 grains and the percentage of full bales. The yield components determining yield increase were the number of panicles / m2 and the number of seeds/panicles. Nerica 3 variety gave higher yields compared to the Nerica 8, the closer the spacing, the higher the yield. There were a strong significance and positive correlation between yield, number of panicles, and the number of grain per panicle. The spacing that gives the highest number of panicle per m2 was 15 cm X 15 cm and this spacing gave good yield in the region where the study was carried out.
Physiological and molecular control of sinkactivity, partitioning efficiency ...manjupainkra
This document discusses source-sink relationships in plants and factors that influence crop yield. It defines sources as regions where organic materials are synthesized, such as leaves, and sinks as non-photosynthetic organs that import photosynthates, such as roots, seeds and fruits. Photosynthates are transported from sources to sinks via the phloem. The harvest index is defined as the ratio of economic yield to biological yield, representing the efficiency of biomass partitioning. Crop yield is determined by interactions between yield components - including the number of reproductive units and grains - and environmental factors. Improving photosynthetic efficiency, source activity and sink strength will be key to increasing crop yields in the future.
This document discusses source-sink relationships in plants and factors that influence crop yield. It defines sources as regions where organic materials are synthesized, such as leaves, and sinks as non-photosynthetic organs that import photosynthates, such as roots, seeds and fruits. Photosynthates are transported from sources to sinks via the phloem. The harvest index is defined as the ratio of economic yield to biological yield, representing the efficiency of biomass partitioning. Crop yield is determined by interactions between yield components - including the number of reproductive units and grains - and environmental factors. Improving photosynthetic efficiency, source activity, and sink strength will be key to increasing crop yields in the future.
Physiological and molecular control of sink activitymanjupainkra
This document discusses source-sink relationships in plants and factors that influence crop yield. It defines sources as regions where organic materials are synthesized, such as leaves, and sinks as non-photosynthetic organs that import photosynthates, such as fruits. Sugars are transported from sources to sinks via phloem loading and unloading processes. Harvest index is defined as the ratio of economic yield to total biological yield, and crop yield can be increased by improving either factor or both. Yield components like number of reproductive units and grains per unit also influence overall yield.
This document discusses various types of environmental stresses that can affect plant growth including drought, high or low temperatures, excessive soil salinity, and inadequate minerals in the soil. It describes different mechanisms by which plants can adapt to or tolerate drought conditions, such as escaping drought by having a short lifecycle, avoiding stress through stomatal regulation and increased photosynthetic efficiency, and tolerating stress through enhanced water conservation and storage abilities. The document focuses on defining and classifying different types of drought, as well as adaptation strategies employed by crops to survive in drought environments.
The leaf miner, Coelaenomenodera elaeidis (Coleoptera: Chrysomelidae) is a high priority insect pest of the oil palm. The study examined the influence of temperature and rainfall on C. elaeidis abundance in the Okomu oil palm plantation between 2007 and 2009. Climatological data were obtained from the Okomu meteorological station. Pest and weather data were analyzed using multiple linear regressions. Highest mean temperature (33.13 0C ± 1.29) and rainfall (233.73mm ± 176.01) were recorded in 2007. There were significant relationships between adult (0.045) and pupa (0.02). C. elaeidis stages with rainfall and minimum temperature in 2007. Leaf miner predictions were evaluated for the different leaf miner stages using their corresponding model equations. The mathematical relationship between the insect stages (larva, pupa and adult) and weather factors (rainfall and temperature) implies that pest prediction can be made for the different leaf miner stages using their corresponding model equations giving specific values for rainfall and temperature. The variations in the seasonal patterns of temperature and rainfall are of major significance as a cue to timing leaf miner abundance and ensuring effective control. This study recommends control of the C. elaeidis before the onset of the dry season and temperature build up. This improves management of the leaf miner by controlling it more effectively.
This study used a population viability model to analyze the conservation status of the Borassus aethiopum palm tree population in Lamto Reserve, Ivory Coast. The model predicted that under current conditions, the population would increase slowly over time. However, it would become skewed towards juveniles. Increased harvesting, especially of adults for sap extraction, risks population decline. Encouraging sustainable harvesting methods and replanting efforts are needed to balance utilization and conservation of this slow-growing species.
Drought stress is one of the major abiotic factors affecting seed germination and plant growth especially in arid and semi-arid regions. In this study, we investigated the effects of drought stress on seed germination and seedling growth of five varieties of rapeseed. Seven drought stress levels of zero (control), -3, -5, -7, -9, -11 and -13 bars were performed using polyethylene glycol-6000 (PEG-6000). A completely randomized design with three replications was used for this experiment. Germination percentage (GP), germination rate (GR), mean germination time (MGT), root length (RL) and shoot length (SL) were measured to evaluate the varieties response to PEG-induced drought stress. Drought stress, variety and the interaction drought × variety had a significant effect on all studied parameters. GP and GR decreased with the increase in stress level, while MGT increased. There were no seeds germinated for all varieties at -11 bars and -13 bars. Shoot length decreased with increasing drought stress but different varieties show different performance under stress environment. Root length decreased with increasing level of severe drought stress. However, the presence of moderate drought stress could even improve the root growth of the investigated varieties. The varieties ‘INRA-CZH2’ and ‘INRA-CZH3’ exhibited the highest germination percentage and the best early seedling growth. Thus, they could be recommended for environments with early cropping cycle drought.
Similar to Afewthoughtsongrapevinetrainingsystems june (20)
Vertical tube irrigation was tested on jujube trees in layered soil fields in Xinjiang, China. Field experiments found that vertical tube irrigation resulted in slightly lower jujube yields but higher water savings of 47-68% and improved irrigation water productivity compared to surface drip irrigation. Laboratory experiments on layered and homogeneous soil found that layered soil had less cumulative infiltration, a larger wetted area, slower vertical but faster horizontal wetting front migration due to layer interfaces, and increased water content at layer interfaces with vertical tube irrigation. Vertical tube irrigation in layered soil was found to retain more water in the root zone and reduce water loss, improving irrigation water productivity for jujube trees.
1) Multi-leader tree training systems involve planting apple trees with two, three, or four main branches or leaders rather than a single central leader. This creates a more open, rectangular tree structure resembling a "fruit wall" that is easier to manage than traditional high-density spindle trees.
2) Studies found that multi-leader trees had higher branch numbers and shorter branch lengths than single-leader spindles. While spindles were more productive in early years due to higher planting density, multi-leader yields increased over time to match or exceed spindles by year 5-6. Fruit quality was similar or better with less color loss at the bottom of multi-leader trees.
3) The benefits
Training and pruning fruit trees is important to develop a strong framework that supports high fruit production. A primary goal is to open up the tree canopy to maximize light penetration for flower bud development. There are two main training systems - central leader and open center. Central leader uses a main trunk with uniformly spaced scaffold branches in whorls, creating a Christmas tree shape. Proper training directs growth into the desired shape with minimal cutting compared to pruning.
[19437714 hort technology] effects of early tree training on macadamia prod...Boonyong Chira
This study assessed the effects of early training of young macadamia trees to a central leader compared to a minimally pruned control. They found that training trees to a central leader reduced cumulative yields over the first 3 years by 16-23% compared to the control, correlated with fewer racemes per tree. Early training of the upright cultivar appeared to improve storm resistance, but no effect was seen in the more spreading cultivar. The yield penalty suggests the industry's recommendation of early central leader training should be reconsidered.
- The article evaluates different hand-picking methods for harvesting apples as potential grasping techniques for a robotic harvesting system. It aims to identify techniques that do not require knowledge of the fruit's orientation or stem location.
- Experiments analyzed the contact forces and angles of rotation during picking of different apple varieties grown in various systems. Results show fruit separation can be detected and distance to separation varies from 3-7 cm depending on variety.
- The optimum picking method relative to stem attachment was identified for each variety based on separation rates and bruising potential to determine effective techniques for an undersensed robotic harvester.
This document discusses agricultural robots and their applications in crop production. It addresses two main challenges facing 21st century agriculture: sustainably increasing food production and addressing farm labor shortages. Agricultural robots can help meet these challenges through precision farming techniques using advanced sensing and automation to optimize inputs, and by replacing or assisting human workers in tasks like weeding and harvesting. The document outlines different types of agricultural robots, including self-propelled mobile robots and robotic implements, and provides examples of applications like mechanical weeding, lettuce thinning, fruit harvesting, and vine pruning. It focuses on the requirements and challenges of autonomous navigation, crop and environment sensing, and interaction with crops for agricultural robots operating in agricultural environments.
[19437714 hort technology] effects of early tree training on macadamia prod...Boonyong Chira
This study assessed the effects of early training of young macadamia trees to a central leader compared to a minimally pruned control. Trees of two cultivars were either trained to a central leader through pruning every 3-6 months for the first 2 years or were minimally pruned. Training to a central leader reduced cumulative yields over the first 3 years by 16-23% due to fewer racemes per tree. The upright cultivar showed improved storm resistance with training, but no effect was seen in the more spreading cultivar. The yield penalty from early central leader training suggests the current industry recommendation should be reevaluated.
Training and pruning fruit trees is important for proper growth and high yields. A primary goal is developing a strong framework that supports fruit production. Properly trained trees through techniques like central leader training will yield fruit earlier and live longer. Annual training removes dead wood and opens the canopy to maximize light penetration essential for bud development and fruit quality.
Training and pruning fruit trees is important for proper growth, high quality fruit production, and long tree life. A primary goal is to develop a strong framework that supports fruit loads without breaking branches. This is typically done through central leader training, which involves selecting a central trunk with uniformly spaced scaffold branches forming a Christmas tree shape. Summer training directs growth and minimizes cutting compared to dormant pruning.
This document discusses different pruning forms for fruit trees: central leader, open center, and modified central leader. The central leader form has a main vertical trunk with lateral branches growing in layers, forming a pyramid shape. The open center form heads back the central leader to encourage outward growth of scaffolds. The modified central leader combines aspects of the first two forms. The document provides guidance on establishing the framework for each form when trees are young and pruning mature trees to maintain their shape and improve fruit quality.
Pruning fruit trees requires different techniques than other landscape trees. Proper pruning helps improve fruit quality by maximizing light exposure, distributing fruiting wood, controlling tree size and health, reducing limb breakage, and increasing air flow. Pruning is usually done during dormancy from January through March to establish the tree structure and remove damaged or diseased branches, though some summer pruning may also be needed. Tools must be disinfected between cuts to prevent disease spread.
Central leader-modified-central-leader-pruning-presentationBoonyong Chira
Central leader and modified central leader pruning styles are used to maximize fruit production and quality for non-Prunus fruit trees. This involves keeping a central leader and scaffold branches that are spaced to allow light and air penetration. Without proper pruning, branches become crowded, restricting light and promoting pests. Trees should have 20-40% growth removed annually to maintain the shape and 10-20% is common with good practices. Examples of different fruit trees pruned in the central leader and modified central leader styles are provided.
This document provides information on advanced techniques for small orchards. It discusses the importance of tree structure for a healthy and productive orchard. Proper training and pruning techniques are explained as complimentary methods for controlling tree height and filling available space. Standard pruning cuts like heading, thinning, and renewal cuts are defined. Recognizing fruiting wood versus vegetative wood is important for productive pruning. Various training systems like central leader, open center, espalier, and container growing are covered. Maintaining balanced growth between fruiting and vegetative wood is a key objective.
The dwarf apple fruiting wall system was developed at Oregon State University over 25 years. Trees are planted on dwarfing rootstocks and trained to a central leader using a trellis system. Rows are planted 12-16 feet apart with trees spaced 4-6 feet within rows. The system produces early and heavy crops of 35-45 tons per acre through precise pruning to maintain an open tree shape that facilitates harvesting. Advantages include high yields, mechanized pruning for some varieties, and ease of harvesting. Disadvantages require investment in trellising and irrigation.
This document provides an introduction to micro/nano-bubbles and their applications. It discusses how micro-bubbles are different than larger bubbles in that they can remain stable for long periods of time and gradually decrease in size through gas dissolution. It is noted that free radicals are generated when micro-bubbles collapse. The document focuses on biological applications of micro/nano-bubbles, including improving marine life growth and uses of the free radicals generated. Methods of generating micro-bubbles and controlling bubble size distribution are presented. Current and potential future applications to areas like fermentation and cell-level treatment are summarized.
This document provides specifications for various aluminium profile slots and t-nuts. It includes dimensions, weights, material type and other details for profile sizes ranging from 20x20mm to 80x80mm. Contact and ordering information is provided for AICS CO., LTD., the manufacturer of the aluminium profiles.
The wastewater lagoon in Parsons, WV was experiencing multiple permit violations due to issues like low dissolved oxygen, high BOD and TSS levels, and algae blooms. The city's old surface aeration system was ineffective and expensive to maintain. They installed a portable aeration system from Triplepoint Water Technologies which quickly resolved the compliance issues and was more cost effective. The new system uses fine and coarse bubble diffusers to efficiently mix and aerate the lagoon, reducing operating costs significantly compared to the old system.
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This document announces the winners of the 2024 Youth Poster Contest organized by MATFORCE. It lists the grand prize and age category winners for grades K-6, 7-12, and individual age groups from 5 years old to 18 years old.
1. See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/259624430
A few thoughts on grapevine training systems
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2. WineLand · June · 2012
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Alain Deloire
A few thoughts on grapevine training systems
Figuur 1 Figuur 2
Figuur 1 Figuur 2
Figure 1: Pruning system named cordon de Royat. The number of
primary shoots will be determined by the number of latent buds per spur.
The density of the vegetation will depend on the distance between spurs.
Figure 2: Pruning system named Guyot. The number of primary shoots
will be determined by the number of latent buds per cane. The density
of the vegetation will depend on the length of internodes. The cane is
positioned horizontally (or bended and twisted) to avoid the acrotony
(named as well cane’s apical dominance).
Which criteria should decide the choice of a training system?
Why use the Lyre instead of the Vertical Shoot Positioning
(V.S.P.)? What are the advantages (if any) of the Smart-Dyson
over the Goblet (bush vine)?
This article will try to give some information and guidelines on
how to make a decision regarding the choice of training and
pruning systems and will give some information regarding the
ratio leaf to fruit. The article is presented using a Q&A format
to simplify the reading and to help promote discussions and
experimentation on training systems.
What is vine architecture?
Vine architecture is the result of the training system which in-
cludes the pruning and the trellis system. The geometry of plan-
tation (distance between vines and rows represents the density
of plantation) is part of vine architecture. The way a cultivar will
grow, the capacity of the soil, the rootstock if we include the
subterranean architecture, will influence the vine architecture.
How does a pruning system work?
Pruning is necessary to maintain the health and to control the
productivity of the vine on a long term basis. A pruning system
is chosen according to a) the number of latent buds per vine or
m2
, which will determine the yield per vine or m2
; b) the number
of primary shoots per surface unit which will be according to the
number of buds per spur (cordon) or per cane (Guyot) (Figures
1 and 2). The Guyot is known to increase the fertility for some
cultivars. The bud fertility is related to the position of the latent
buds on a cane and there is a gradient from bottom to top. The
buds’ fertility along a primary shoot follows a Gaussian pattern.
What does a training system do?
A training system helps to control and regulate canopy growth
and exposure of the leaves and grapes to light, wind and humid-
ity (Figure 3). The growth of the laterals will depend on the vigour
of the terroir unit (Figure 4). The laterals are responsible of the
width of the canopy. A good training system will optimise:
a) a ratio exposed leaf area /yield (per vine or m2
) ;
b) a ratio exposed leaf area/shaded leaf area;
c) a ratio primary and secondary shoots;
d) the bunch microclimate.
How the yield per bud/vine is determined?
The yield per bud/vine is determined over two seasons (two
years in area with real winter or two seasons the same year
in tropical climate). It is cultivar and climate (light, temperature,
wind) related. The vine’s bud fertility/productivity occurs over
two years with the following main phonological stages:
Year n
• Differentiation of inflorescence’s primordia (= first step of in-
florescences formation) in the new latent bud.
WineLand June 2012
Prof Alain Deloire – Department of Viticulture and Oenology, Stellenbosch University
3. WynLand · Junie · 2012 83
Vertikale lootposisionering
Figuur 3
Figure 3: Example of Vertical Shoot Positioning, V.S.P. The width of the
canopy is due to the growth of the secondary shoots (named the later-
als). The growth of the laterals depends on the vigour of the terroir unit
(temperature, water and nitrogen mainly) and the choice of the rootstock.
Figuur 4
Figuur 5
Figure 5: Decrease in transmission of solar light intensity according to
the leaf layer number (i.e. thickness of the canopy). This figure illustrates
the importance of both canopy width and density. To get less shaded
leaves as possible, it is recommended to avoid canopy width > 0.40 m
(Smart and Robinson, 1991; Carbonneau et al., 2007).
Deloire, 2008
Figure 4: The growth of the laterals on a primary shoot (PS) will depend
on the apical dominance which is due to the apex and will depend
mainly on the vigour of the terroir unit (water and nitrogen). By removing
the apex, one allows the growth of the laterals immediately underneath
the apex and along the primary shoot.
Year n+1
• Differentiation of flowers’ primordia (= first step of flowers for-
mation) in the latent bud during bud break and beginning of
inflorescence growth,
• Inflorescence growth (elongation) and flowers differentiation
from bud break to flowering,
• Flowering and opening of the stamens (pollen release),
• Flower fertilisation (depends on climate and vine physiology),
• Ovary/young berry’s cell multiplication (after ovule fertilisation
only. At this stage the elongation of the inflorescence is fin-
ished and the number of berries is determined),
• Cell enlargement during berry green growth and ripening
stages (determines the berry’s volume).
How are yield per vine and per hectare determined?
This part of the yield production is dependent on:
i) the pruning system (number of buds per vine);
ii) the training system (number of arms, cordons, canes: the
result is the number of buds per vine);
iii) the plantation density (number of vines and buds per hect-
are);
iv) and on the various cultural practices (irrigation, soil or leaf
fertilisation) and canopy manipulation.
One should remember that:
– The training system x pruning system will determine the can-
opy architecture,
– The pruning system will determine the number of buds per
vine or m2
,
– The plantation density (distance between vines and rows) will
determine the number of vines and buds per hectare,
– The various cultural practices (mainly irrigation and fertilisa-
tion) will affect the vine physiology and indirectly bud fertility
and berry growth, volume and composition.
– The canopy manipulation x canopy architecture will deter-
mine the leaf and bunch microclimate,
– The climatic conditions of a “terroir unit” (soil x climate) will
affect as well the vine physiology and indirectly bud fertility,
berry growth and composition at the meso- and micro- cli-
matic levels,
– The soil capacity versus soil type, depth, and water content
will affect (depending on the rootstock), root development
and morphology, root type, anatomy and functioning, which
in turn will influence vine vigour and yield, and indirectly berry
growth and composition.
– Rootstocks are genetically controlling cultivars transpiration,
and thus vine water use efficiency (WUE, i.e. biomass gain as
a function of water use).
How do we estimate the potential yield per vine and per hectare?
Crop estimation per vine and per hectare could be done using
the following formula:
4. WineLand · June · 2012
84
Figure 6
Figure 6: Example of daily temperature evolution at the berry level over
the ripening period of Sauvignon blanc. The leaves and the laterals have
been totally removed at the bunch zone (at berry pea size stage), morn-
ing side of the canopy. Because of the influence of the sea breeze, the
temperature of the exposed bunches (blue curve) never increases above
30ºC. No sunburn or berry dehydration has been observed over three
years (2010, 2011 and 2012; Elgin). This allows for an increase in the
diversity of wine styles and reduce the berry and wine pyrazines’ level
responsible of aromatic profiles as asparagus, green bean and green
pepper.
Figuur 7
Figure 7: Example of total leaf and lateral removal (at berry pea size
stage), on Merlot in the Stellenbosch area. The row orientation (East-
West) allows such canopy manipulation. No sunburn or berry dehydration
has been observed. The level of pyrazine in the wine has been decreased
due to the effect of the light at the berry skin level (Eikendal vineyard).
H
W
E
L
uur 8
Figure 8: The Canopy External Leaf Area Perimeter (CELAP) represents
the very first photosynthetic leaf layers. CELAP allows for the estimation
of the ratio of CELAP to kg of grapes produced by the grapevine.
Figuur 9
Figure 9: Training system called “Lys”, with two levels of cordon (origin
from Portugal). It is an example of a training system which allows for the
increase in the number of buds per vine (need some adaptation for South
Africa).
Carbonneau & Cargnello, 2003
Deloire, 2010
Yield = (vines/hectare) x (number of clusters/vine) x (average
cluster weight)
- Vines per hectare: determined by the vines and rows spac-
ing.
- Number of clusters/vine: will depend on latent bud fertility, on
the number of primary shoots/vine and on the cultivar.
- Average cluster weight: will depend on the number of berry/
cluster and the average berry fresh mass at harvest.
Canopy manipulation: possible benefit of leaf and lateral
removal at the bunch zone
Light interception. Light is important for leaf photosynthesis
(Figure 5) and leaf stomata density. In most C3 plants photo-
synthesis is saturated at approximately 25% of full sunlight. This
is why in most terroir units in South Africa there is enough light.
Sunlight within the canopy (avoiding shade) will increase latent
bud fertility by 10 to 20%.
Bunch microclimate. To bring direct or indirect light to the
bunch level is always favourable for grape quality (versus berry
composition). More anthocyanins and lower levels of pyrazines
(green characteristics) will be formed in the presence of more
light at the bunch zone. Higher light and temperature exposure
could also reduce the berry’s level of organic acids such as ma-
lic acid. An increase in light at the bunch level doesn’t always
mean an increase in temperature. It will depend on the wind (sea
breeze) and humidity effect (figure 6).
5. WynLand · Junie · 2012 85
VLP: oop lower
Figuur 10
Figure 10: Example of a 3 wire Perold system (V.S.P.) which allows
opening the canopy. This type of trellising system has to be reasoned in
relationship with the vigour of the vineyard or the irrigation program to
control the vigour.
Figure 11
Figure 11: Example of Smart-Dyson. It is easy to transform a V.S.P. in
Smart-Dyson and it is recommended to do it for situations within the
width of the canopy is ≥ 40 cm. The distance between the cordon and
the soil has to be a minimum of 0.8 to 1.2 meter if possible, to allow
bending half of the primary shoots, preferably at flowering. The Smart-
Dyson will be preferably used in vigorous situation for which the bunch
and canopy microclimate needs to be improved by reducing the width
of the canopy and increasing the exposed leaf area.
It is sometimes difficult to choose the correct canopy manipu-
lation to apply, as there is no single recipe for all varieties and
climates. For example, light at the bunch level could help to re-
duce the berry skin pyrazine level but it could also, in some situ-
ations, reduce the titratable acidity. Choices of canopy manipu-
lations (figure 7) have to be made according to the desired wine
style, the row orientation and the macro-mesoclimate (warm/
hot versus cool/temperate). It is always a compromise: at the
berry level each, chemical compound follows its own pathway,
thus one cannot rely on one compound (example sugar) to pre-
dict the evolution of another compound (example malic acid).
What is the desired yield per vine according to wine quality/style?
The basis for reasoning is at the vine level, and the ratio of leaf
to fruit has to be considered.
Ratio exposed leaf area on yield. The first important ratio
is the exposed leaf area on yield per vine or m2
(table 1). The
Canopy External Leaf Area Perimeter (CELAP) represents the
very first photosynthetic leaf layers. CELAP allows for the esti-
mation of the ratio of CELAP to kg of grapes produced by the
grapevine (Figure 8). This indicator can be used at véraison and
during the berry ripening period.
For a classical vertical shoot positioning training system, the for-
mula is: CELAP (in m2
/vine)= {(2H + W)}. L
Where H = height of the canopy from the bottom of the primary
shoots on a cordon (m); W = width of the canopy in the middle
of the canopy (m); L = length of the canopy, usually cordon or
Guyot cane length (Murisier, 1996; Zufferey, 2000).
If we assume a ratio of one: one m2
of exposed leaf area for 1 Kg
of grape. Thus, table 1 gives examples of CELAP to fruit ratios
versus few training systems.
From this we can see that alternative training systems which will
allow increasing the number of buds per vine or m2
(examples:
Geneva Double-Curtain, T-trellis, Lys (figure 9) or the Lyre) will
give us a crop of 4/5 Kg per vine, allowing to crop 15 to 20 tons
(or more) per hectare, respecting the bunch and wine quality.
There are also solutions which allow the increase of exposed
leaf area and therefore proportionately the yield per vine (for ex-
ample: transforming a V.S.P. in Smart-Dyson or using a 3 wires
Perold system (V.S.P.) which allows to open the canopy letting
the shoots partially hanging in the row) (See respectively figures
10 and 11). The laterals can contribute to increase the exposed
leaf area but their growth as with any vegetative growth has to
stop preferably at véraison. A young leaf formed at véraison will
be adult and source of carbohydrate only 40 days after having
acquired its definitive size.
As can also be seen from Table 1, Goblet (bushvine) training sys-
tems could give high yields/hectare because of the high density
plantation. These systems are used either for quality purpose
in steep slope situations (figure 12) or in dry land (figure 13),
and usually for specific cultivars as Syrah (Goblet with posts),
Grenache, Carignan, Pinotage or Chenin (goblet without post).
Table 1: Examples of global reasoning regarding to specific training systems. All parameters could be changed if the exposed leaf area on yield ratio
is respected. The length of the single cordon is 1 meter for these examples (except for the Goblet). For each example of training system, this table is
presenting the best yield per vine value for a thin canopy (w ≤ 30 cm), and considering that the exposed leaf area is mainly due to the primary shoot
leaves without contribution of laterals. The Goblet “échalassé » falls apart.
Training system CELAP (m2
/vine) Yield / vine (Kg.)
Distance vines x rows (m.)
Vines per hectare
Estimated yield / hectare
(Kg)
V.S.P. [(1.2x2) + 0.3] x 1 = 2.7 2.7 1 x 2.5 (4000) 10,800
Smart-Dyson [[(1.2x2) + 0.3] + 1] x 1 = 3.7 3.7 1 x 2.5 (4000) 14800
Lyre [[(1.2x2) + 0.3] x 2] x 1 = 5.4 5.4 1 x 3 (3333) 17998.
Goblet “échalassé » 1.5 1.5 1.2 x 1.2 (6944) 10416.
6. WineLand · June · 2012
86
Figuur 12
Figure 12: Example of Goblet “échalassé” from L’Ormarins vineyard
(Syrah). This training system allows to get a 360° light penetration at the
leaf and bunch zones. It is interesting in a situation where there are steep
slopes and for high quality wine for specific cultivars as Syrah, Grenache
noir or Viognier.
Figuur 13
Figure 13: Example of non-trellised Goblet, which has to be used for
cultivars with raised shoots.
How do we correlate the wine style to the leaf to fruit ratio
per vine, or the wine style to the yield per vine?
To achieve the matching between wine style/quality and yield
per vine, the following information needs to be provided:
- The ratio exposed leaf area to yield ( as a minimum)
- The ratio total leaf area to yield
The matching of yield per vine and wine style/quality has to be
defined in the context of terroir units (climate and soil), cultural
practices such as irrigation and canopy manipulation (bunch mi-
croclimate) and clones. In other words, the leaf to fruit ratio is
not the only criteria which impacts on the berry composition and
wine style. The climate (temperature, light, wind, humidity) and
the soil (water and minerals restitution to the plant) in interaction
with the bunch microclimate play a major role in berry composi-
tion and wine styles. Rootstocks, by controlling vine transpira-
tion, will play a role on vine carbohydrates production.
Why do we practice bunch thinning (green harvest)?
The bunch thinning (green harvest) method is practiced when
the yield per vine is estimated too high or when the ratio of ex-
posed leaf area/yield is estimated to be unbalanced. This means
that one has to be able to know/estimate when a vine is bal-
anced or not. It is not simple because it will depend on nu-
merous factors: leaf to fruit ratio, vine water status, terroir unit
(climate and soil), bunch microclimate and minerals.
When do we carry out bunch thinning?
In most vineyards, bunch thinning is done at véraison, when
it is possible to select the most-ripe, promising bunches. In a
young vineyard, it is a current practice in Europe to remove the
inflorescences at flowering, and during the first three years after
plantation, to limit carbohydrates competition.
An alternative/ additional practice is to remove inflorescences
at flowering/berry set to fit the yield per vine and the yield per
hectare according to a specific crop target (6, 8, 10, 12…tons/
hectare). This has to be considered in the light of the correct leaf
to fruit ratio per vine in interaction with the terroir unit, cultural
practices and expected wine style.
It is difficult to conclude on the real effect of bunch thinning on
grape quality from the literature as the results are different from
one situation to another. Bunch thinning has to be considered
as a backup solution, and mainly be used to remove the non
promising bunches (green bunches or bunches carrying green
berries after véraison), the shoulders of big bunches, to homog-
enise the bunch ripening level from véraison onwards.
New or adapted training systems?
It is important to keep in mind that it is always possible to adapt/
transform a particular training system to the conditions of a spe-
cific vineyard and again considering yield/vine or hectare, wine
style and profitability.
The decision to use or transform a particular training system
should be according to physiological principles in the context
of specific terroir units instead of using recipes. Recommenda-
tions should always be proposed/discussed in the light of the
production targets which often depend on the terroir units, the
market demands and the farm profitability (see for review Eben
Archer, 2011. Technical yearbook, Wynboer). At least one has
to keep in mind that vines are cultivated for the quality of the
crop and not only for the quality of the leaves, even if leaves are
important pre- and post-harvest for carbohydrates reserve.
Acknowledgements
The author is thankful to Dr Richard Smart added value to this
article and to Ms Anneli Bosman and Marianne McKay (DVO,
University of Stellenbosch) for critical reading. The literature can
be provided on request.
For further information contact: Prof Alain Deloire at deloire@sun.ac.za
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