Rice yields decline
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Higher nighttime temperatures from global warming are reducing rice yields according to a study conducted from 1992-2003 at the International Rice Research Institute in the Philippines. The study found that minimum temperatures increased by 1.13°C from 1979-2003 which corresponded to a 10% decline in rice yields for each 1°C increase in minimum temperatures during the growing season. Maximum temperatures did not significantly impact yields. The objectives were to analyze temperature and radiation trends and their effects on rice yields. Weather data was collected from a on-site weather station and rice crop data from experiments using the rice variety IR72. Statistical analyses found that increases in minimum temperatures reduced rice biomass and yields while maximum temperatures did not.
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Culture under shelters of fruit, vegetable and flower species developed from the classical to the greenhouse agro - industrial, currently known for its modernity and high level of automation (heating, misting, of conditioning, control, regulation and control, supervisor of computer etc.). New techniques have emerged, including the use of control devices and regulating climate variables in a greenhouse (temperature, humidity, CO2 concentration etc.) to the exploitation of artificial intelligence such as neural networks and / or fuzzy logic.
What is Photosynthetic active Radiation and Crop Growth Rate
What is Photosynthetic active Radiation and Crop Growth Rate. how Photosynthetic active Radiation effects the crop growth rate.how radiations increase and decrease the crop growth
Cloud IoT Based Greenhouse Monitoring System
This project explains the design and implementation of an electronic system based on GSM (Global System for
Mobile communication), cloud computing and Internet of Things (IoT) for sensing the climatic parameters in
the greenhouse. Based on the characteristics of accurate perception, efficient transmission and intelligent
synthesis of Internet of Things and cloud computing, the system can obtain real-time environmental information
for crop growth and then be transmitted. The system can monitor a variety of environmental parameters in
greenhouse effectively and meet the actual agricultural production requirements. Devices such as temperature
sensor, light sensor, relative humidity sensor and soil moisture sensor are integrated to demonstrate the proposed
system. This research focuses on developing a system that can automatically measure and monitor changes of
temperature, light, Humidity and moisture level in the greenhouse. The quantity and quality of production in
greenhouses can be increased. The procedure used in our system provides the owner with the details online
irrespective of their presence onsite. The main system collects environmental parameters inside greenhouse
tunnel every 30 seconds. The parameters that are collected by a network of sensors are being logged and stored
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Using empirical and mechanistic models to predict crop suitability and produc...Decision and Policy Analysis Program
Using well-established empirical and mechanistic models such as Ecocrop, Maxent, DSSAT to assess the impact of climate change on productivity and climate-suitability of crops and production systems.Class 3 plant response to gh & equipments used
The document discusses plant response to greenhouse environments and instruments used to control greenhouses. It describes key greenhouse environmental factors like light, temperature, air composition, humidity, and CO2 concentration. It then explains how each factor affects plant growth and desirable levels. The document also outlines portable instruments that can be used to measure and control important environmental conditions in greenhouses, including thermometers, hygrometers, anemometers, CO2 monitors, light meters, and pyranometers. These instruments help greenhouse operators accurately measure and regulate the environment to optimize plant growth.
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Modelling and predicting wetland rice production using support vector regression
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OPTIMIZING THE GREENHOUSE MICRO-CLIMATE MANAGEMENT BY THE INTRODUCTION OF ART...
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This study aimed to calibrate the CERES-Maize and CERES-Sorghum crop simulation models for maize and sorghum crops grown under dry conditions in Juranda, Paraná, Brazil. Experiments were conducted with three planting dates in 2014-2015 for each crop. Variables such as days to flowering, leaf area index, yield, and 1000 seed weight were measured and used to calibrate the models. The results demonstrated that the models were highly efficient at simulating crop cycles, yield and leaf area index, with agreement indices and modeling efficiency values above 0.90. The calibrated models can satisfactorily and comparatively simulate maize and sorghum yields for different planting dates in the study
21
The study evaluated the effect of mean temperature, solar radiation, and photothermal quotient (PTQ) at anthesis and maturity stages of wheat grown under different environmental conditions provided by varying planting windows. Regression models were developed relating climate variables (temperature, radiation, PTQ) to wheat yield parameters (grains per square meter, grain weight, yield). Results showed temperature and PTQ at anthesis had direct relationships with yield parameters, while temperature at maturity had inverse relationships. Solar radiation at anthesis and maturity also had direct relationships with yield parameters. PTQ, representing the combined effect of temperature and radiation, had the strongest direct relationships with all yield parameters. This confirms PTQ is a key determinant of wheat yield under varying environmental conditions
Determination of Arid and Temperature Resistant Sweet Corn (Zea mays sacchara...
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The objective of the present study is to identify aridity and temperature resistant sweet corn variety candidates and to provide resource material for development of new hybrid varieties. The research was designed as three-peat random blocks experimental design in Siirt and Sakarya locations in 2014, and irrigation application was conducted with drip irrigation method. Mean plant water consumption in control (I100) was 808 mm and 633 mm in Siirt and Sakarya, and the mean irrigation water amount was 684 mm and 138 mm, respectively. The statistical significances of differences among soil moisture content, chlorophyll-meter value, crop water stress index, fresh corncob, and grain yield were investigated. The arid and temperature resistant sweet corn line was determined according to soil moisture content, chlorophyll-meter value, and crop water stress index. The most arid and temperature resistant corn line, variety line #2, had the lowest moisture content and crop water stress index value but the highest chlorophyll-meter value. We found that to determine the arid and temperature resistant corn lines, soil moisture content values can also be used together with chlorophyll-meter values and crop water stress index. Analyses of moisture deficit grain yield loss in drought tolerant maize (Zea ...
Analyses of moisture deficit grain yield loss in drought tolerant maize (Zea ...Professor Bashir Omolaran Bello
Development of drought tolerant maize cultivars is prerequisite to achieving stable grain yield in
drought–prone ecologies of Nigeria’s Guinea savanna. However, success has been limited mainly due
to lack of maize genotypes that show clear differences in response to well defined moisture deficit
condition. Two sets of drought tolerant (DT) maize germplasm were evaluated under screenhouse and
field conditions between 1999 and 2002. In the screenhouse study, performances of the genotypes
were compared under well-watered condition and moisture deficit imposed at different growth stages.
Under field conditions, the first set comprising 11 accessions along with a check were evaluated for 4
growing seasons while the second set which comprised 3 DT varieties were evaluated along with 2
check varieties using monthly plantings between April and August of 2001 and 2002, respectively. In
the first set, post anthesis moisture deficit significantly reduced grain yield by 25 to 73.5% in the open
pollinated varieties (OPVs) and by 20 to 64% in the hybrids. Grain yield under field conditions ranged
from 2.48 to 3.49, 2.82 to 3.73 and 3.58 to 4.76 tons/ha-1 for 1999, 2000 and 2001 full growing seasons,
respectively, and 2.03 to 2.50 tons/ha-1 for 2000 late growing season. In the second set, pre and post
anthesis moisture deficits reduced grain yield by 77.6 and 95.8%, respectively, of well watered
condition while in the field, grain yields in the genotypes were highest for plantings made in April and
July (1.90 - 2.5 t/ha), lowest for August (0.7 -1.8 t/ha) when moisture deficit coincided with
reproductive phase. Yield stability exhibited under moisture deficit and on the field by 8522-2, Oba
super 2 and AK9943-DMRSR in the first set as well as DT-SR-Y C0 and DT-SR-W C0 in the second set,
indicates their suitability either as cultivars per se or as potential source of DT alleles for
development of DT maize varieties for Nigeria’s savanna ecologies.Effect of Greenhouse Cooling Methods on the Growth and Yield of Tomato in a M...
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Climate resilient crop cultivars in the view point of physiology and genetics...
Climate resilient crop cultivars in the view point of physiology and genetics...Natural Resources Institute Finland (Luke) / Luonnonvarakeskus (Luke)
This document summarizes the ClimBar project which aims to evaluate genetic diversity in barley to support climate adaptation. The project recognizes that barley varieties were domesticated under different past climates than current emerging conditions. It hypothesizes that alleles supporting resilient yields in a changing climate may be found in diverse landraces from the Mediterranean and Fertile Crescent, which experienced climates similar to projections. The project is phenotyping a diverse set of barley accessions, including Spanish landraces and wild barleys, under different environments to understand genotype by environment interactions over time and identify useful alleles for future climate breeding.14)2017-1_Graff Ruiz_Jesús Francisco
Se evalúa la factibilidad de páneles de celdek, luffa, paja y sacos de arpillera, como materiales alternativos de empaque para enfriamiento evaporativo en invernaderos.
Yield of Wheat (Triticum aestivum L.) as Influenced by Planting Date and Plan...
Yield of Wheat (Triticum aestivum L.) as Influenced by Planting Date and Plan...SSR Institute of International Journal of Life Sciences
This document discusses a study on the effects of planting date and planting method on wheat yield in Nigeria. The study tested four planting dates (1st November, 15th November, 1st December, 15th December) and three planting methods (drilling, dibbling, broadcasting) in two locations. Results showed that later planting dates of 15th November and 1st December produced higher grain yield compared to earlier dates. Drilling and dibbling methods also resulted in higher yields than broadcasting. Based on these results, the study concludes that planting wheat from 15th November to 1st December using drilling or dibbling is best suited for the study areas.Requirements for double-cropping in the south-eastern region of Kazakhstan
Атакулов Тастанбек, Алкенов Ельтай, Оспанбаев Жумагали.
Целью нашего исследования является разработка эффективной технологии получения двух урожаев в год на основе использования гребневого посева основной и промежуточной культуры, обеспечивающей резкое повышение продуктивности орошаемой пашни, рациональное использование земельных, водных ресурсов, сохранение плодородия почвы и охрану окружающей среды.
Tastanbek Atakulov, Zhumagali Ospanbaev, Yeltay Alkenov, Karlheinz Köller
The purpose of our research is the development of effective technology for two crops harvests per year based on the use of ridge sowing of main and catch crop culture, providing a sharp increase in the productivity of irrigated arable land, management of water resources, soil fertility conservation and environmental protection with the diversification of irrigated agriculture.
No 17. planting times on growth and yield performance evaluation of wheat
The document discusses a study on the effect of different planting times on the growth and yield of wheat. Three planting dates were evaluated: November 19th (S1), November 29th (S2), and December 9th (S3). S1 and S2 generally performed better than S3 across various growth and yield metrics. S1 produced the tallest plants, most tillers, highest dry matter content, and maximum crop growth and relative growth rates. S1 also resulted in the highest numbers of spikes, spikelets, and filled grains per spike. S1 led to the highest grain, straw, and biological yields. Earlier planting times in November provided more favorable growing conditions and resulted in better wheat growth and yields compared to
Isolation Of Salmonella Gallinarum From Poultry Droppings In Jos Metropolis, ...
The study evaluated the effects of five different rates of poultry manure (0, 5, 10, 15, and 20 tons/hectare) on the growth and yield of watermelon over two growing seasons. Plants that received the highest rate of poultry manure (20 tons/hectare) had significantly greater vine length, number of leaves per plant, number of branches per plant, and fruit weight than plants that received lower rates or no manure. Based on the results, the study recommended that farmers in the area apply 20 tons/hectare of poultry manure to increase watermelon growth and yield.
Changes in Selected Soil Physical Properties and Maize Yields as Affected by ...
The study was conducted at Abakaliki to determine the changes in selected soil physical properties and maize yields as affected by animal wastes application in Abakaliki southeastern Nigeria in 2014 and 2015 cropping seasons. The experiment was laid out in Randomized Complete Block Design with four treatment replicated five times. The treatments were poultry droppings at 5 tha-1 (PD), cow dung at 5 tha-1 (CD), mixture of PD + CD at 5 tha-1 and control (C) – non application of amendment. Bulk density, total porosity, moisture content, aggregate stability and mean weight diameter were determine in the laboratory using appropriate procedure while plant height, leaf area index and grain yield were also, measured in the field using recommended methods. The results showed positive changes in selected soil physical properties and maize yield in the two cropping seasons with the application of animal wastes. Also, improvement in soil physical properties and maize yields were higher in the second cropping season when compared to the first cropping season. Poultry dropping is recommended for farmers to use as fertilizer in maize production because plots treated with poultry droppings recorded the highest maize grain yield in the two cropping season than other treatments.
Growth and Yield Responses of Pigeonpea to Variable Phosphorus Application Ra...
Growth and Yield Responses of Pigeonpea to Variable Phosphorus Application Ra...Journal of Agriculture and Crops
An Agronomic field study was conducted at University of Limpopo Experimental farm, Syferkuil, over two summer growing seasons to determine the optimum phosphorus (P) rate and also assess the productivity of pigeonpea under intercrop with maize. Five P rates (0, 15, 30, 45, and 60 kg P ha-1) were evaluated under sole and intercropped pigeonpea. Treatments were laid out in a randomized complete block design with four replicates. Results revealed that variable P fertilizer rates exerted significant effect on pigeonpea grain yield in both seasons. Highest grain yields of 922 and 1141.7 kg ha-1 under sole and intercrop plots, respectively, were achieved at 45 kg P ha-1 during first and second seasons, respectively. However, the predicted optimum grain yield of 734 and 1034 kg ha-1 based on the response model was achieved at 52.67 kg P ha-1 and 42.84 kg P ha-1, in the respective seasons. Intercropping achieved a significantly higher pigeonpea grain yield (+37%) during second year than sole cropping following P addition; with over 21% mean grain yield advantage across the two planting seasons. Hence, depending on the inherent soil-P level, application of 42-53 kg P ha-1 under pigeonpea/maize intercrop represents the range at which P is optimum for maximum pigeonpea grain yield and better returns for farmers.Effect of shading and cultivation inside greenhouse on some flowering and fru...
Effect of shading and cultivation inside greenhouse on some flowering and fru...International journal of scientific and technical research in engineering (IJSTRE)
High ambient temperature is the greatest problem faced by tropical greenhouse producing
vegetables. Temperature affects the productivity and growth of a plant, therefore using shades to alleviate this
effect could increase the yield of plants grown in greenhouses. This study intends to investigate the effect of
shading and greenhouse conditions on brinjal flowering and traits, and subsequently compare them to open
field cultivation of brinjal. Fertility Levels of Soils under Selected Tree Vegetations for Efficient Agro-...
In many parts of Nigeria, large areas of lands are dominated by tree crop vegetations for timber production and for fruits with land users not knowing the fertility status of soils in these vegetations. Continual evaluation of soil properties of these tree vegetations has become pertinent for agricultural sustainability. This study therefore was carried out to evaluate the fertility levels of soils under selected tree vegetations at National Horticultural Research Institute Okigwe, Imo State, Nigeria. Five tree vegetations that were over 20 years of establishment were selected namely: oil bean (Pentaclethra macrophylla Benth), African breadfruit (Treculia africana), mango (Mangnifera indica), Ogbonu (Irvingia gabonensis) and orange (citrus spp). In each of these tree vegetations, four soil samples were collected at uniform depths (0 – 20, 20 – 40 and 40 – 60 cm) at different locations using soil auger. The samples were analyzed using standard laboratory procedures. Data collected were statistically analyzed using analysis of variance. Results obtained showed that despite the ages of these vegetations, the soils were acidic, low in macronutrient and basic cation concentrations when compared to FAO standard. The highest exchangeable bases and organic matter (1.78%) was recorded on bread fruit vegetation. Therefore, there is need to increase the fertility status of these soils in these tree crop vegetations by adopting measures that will boost organic matter content of the soil irrespective of the duration of the vegetation and this will help in agro forestry and alley cropping.
Part_I_Pub3_JAgricSciFi_afsf10_175
The document describes a study that used the CERES-wheat crop simulation model to estimate the effects of elevated carbon dioxide (CO2) concentration and temperature on spring wheat (Triticum aestivum L., cv. Polkka) in Finland. The model was calibrated using data from wheat variety trials in Finland from 1985-1990 and validated using data from open-top chamber experiments with ambient and elevated CO2 and temperature treatments from 1992-1994. Simulation results suggest that earlier sowing dates would substantially increase grain yields under elevated CO2 conditions and help mitigate decreases from elevated temperature. Adaptation strategies for crop production under future elevated CO2 and temperature conditions are discussed.
Effects of temperature on potato crop
This field study conducted in Burundi shows the genetic variability of potato crop when exposed to temperature increase.
Amman Workshop #3 - M MacKay
The document discusses using genetic and environmental data to more efficiently explore genetic variation in plant genetic resources collections. It proposes a strategy called FIGS (Focused Identification of Germplasm Strategy) to select subsets of accessions from genebank collections for evaluation based on traits of interest and environmental factors associated with those traits. Examples are given where FIGS identified accessions with useful genetic variation for traits like drought tolerance, disease resistance, and salt tolerance more efficiently than random screening.
Cassava (mannihot esculenta cranz) varieties and harvesting stages influenced...
This study investigated the effects of harvesting stages on yield and yield components of 10 cassava genotypes in Ethiopia over two growing seasons. The highest fresh root yield of 23.06 t/ha was obtained after 18 months of planting. Yield and components such as root weight and number of branches differed significantly across stages for all varieties. Harvesting at 18 months provided desirable yields while 15 months was suitable for vegetative propagation material. Correlations showed that plant height, branches, root length and dry weight positively influenced fresh root yield. Therefore, 18 months after planting is recommended for fresh root harvesting under these conditions.
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No 17. planting times on growth and yield performance evaluation of wheat
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Isolation Of Salmonella Gallinarum From Poultry Droppings In Jos Metropolis, ...
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Growth and Yield Responses of Pigeonpea to Variable Phosphorus Application Ra...
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Effect of shading and cultivation inside greenhouse on some flowering and fru...
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We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
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These topics will be covered
- Reducing license cost by finding and fixing misconfigurations and superfluous accounts
- How do CCB and CCX licenses really work?
- Understanding the DLAU tool and how to best utilize it
- Tips for common problem areas, like team mailboxes, functional/test users, etc
- Practical examples and best practices to implement right away
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Rice yields decline
- 1. Rice yields decline with higher night temperature from global warming by ; Shaobing Peng, Jianliang Huang, John E. Sheehy, Rebecca C. Laza, Romeo M. Visperas, Xuhua Zhong, Grace S. Centeno, Gurdev S. Khush, and Kenneth G. Cassman K.K.M.N.Chamara AG/2008/2732
- 3. How temperature affect on rice yield ?? Crop yield crop biomass Photosynthesis Respiration losses Temperature
- 18. THANK YOU...
Editor's Notes
- Trends in maximum and minimum temperatures and radiation from 1979 to 2003 for the whole year ( A – C ), dry season (January to April) ( D – F ), and wet season (June to September) ( G – I ) at the IRRI Farm. Trends (slopes) for the maximum temperature in A , D , and G and radiation in F are not statistically significant at the P 0.05 probability level according to the Student’s t test.
- The relationship between rice-yield attributes (grain yield, above-ground total biomass, and spikelets per m2) and growing-season mean maximum temperature ( A – C ), minimum temperature ( D – F ), or radiation ( G – I ). Yield-attribute data were obtained from irrigated field experiments in which cropmanagement practices were optimized to achieve the highest possible yields from rice cultivar IR72 at the IRRI Farm in the dry seasons from 1992 to 2003. Growing-season mean maximum and minimum temperatures and radiation were calculated from daily values for the entire growing season from transplanting to harvest.