This document discusses different silvicultural systems used in forest management. It defines a silvicultural system as a set of operations used to tend, harvest, and regenerate a forest crop. Several specific systems are described in detail, including the selection system, clearcutting system, shelterwood system, and periodic block system. For each system, the document outlines the procedure, results or effects on forest structure, applicability to different forest types, as well as benefits and disadvantages.
This presentation provides an overview of a field-based practical exercise that allows students in forestry, ecology and natural resources to develop their understanding of forest stand dynamics. The exercise involves measurement of key tree growth parameters in four even-aged, single-species plantation stands of different age but occupying sites with similar soil and environmental characteristics. The selected stands represent key stages in stand development, from establishment to rotation age for fibre production. In the field, students work in small teams to gather data from an equal number of plots within each stand. Tree parameters include top height, crown diameter, live crown ratio and diameter at breast height. In addition, information on stand density and understorey vegetation is collected. Plot size and number can be varied to suit the constraints of class size and available time, though circular plots of 100 m2 are recommended. In the classroom, data are pooled and analysis focuses on presenting tree and vegetation changes through time. The simplest way of interpreting the data is to prepare graphs and charts for each of the parameters, though more advanced statistical interpretations are possible. The project as outlined here can be modified to meet the needs of different groups, and has been successfully used in undergraduate teaching of silviculture and forest ecology, as well as in postgraduate courses in natural resources management.
Download Paper at URL: http://www.researchgate.net/publication/254307252_The_development_of_even-aged_plantation_forests_an_exercise_in_forest_stand_dynamics
Introduction to Agroforestry, Objectives of Agroforestry, Features of Agroforestry, Characteristics of Good Agroforestry systems, 4I system, Importance of Agroforestry etc
This presentation provides an overview of a field-based practical exercise that allows students in forestry, ecology and natural resources to develop their understanding of forest stand dynamics. The exercise involves measurement of key tree growth parameters in four even-aged, single-species plantation stands of different age but occupying sites with similar soil and environmental characteristics. The selected stands represent key stages in stand development, from establishment to rotation age for fibre production. In the field, students work in small teams to gather data from an equal number of plots within each stand. Tree parameters include top height, crown diameter, live crown ratio and diameter at breast height. In addition, information on stand density and understorey vegetation is collected. Plot size and number can be varied to suit the constraints of class size and available time, though circular plots of 100 m2 are recommended. In the classroom, data are pooled and analysis focuses on presenting tree and vegetation changes through time. The simplest way of interpreting the data is to prepare graphs and charts for each of the parameters, though more advanced statistical interpretations are possible. The project as outlined here can be modified to meet the needs of different groups, and has been successfully used in undergraduate teaching of silviculture and forest ecology, as well as in postgraduate courses in natural resources management.
Download Paper at URL: http://www.researchgate.net/publication/254307252_The_development_of_even-aged_plantation_forests_an_exercise_in_forest_stand_dynamics
Introduction to Agroforestry, Objectives of Agroforestry, Features of Agroforestry, Characteristics of Good Agroforestry systems, 4I system, Importance of Agroforestry etc
Forest dynamics helps to understand several succession methods and to know about stand structure and development with forest based models like FORMIND, FORMIX, GRASMIND etc.,
An increasingly industrialized global economy, rapid population growth, land degradation, land use pattern and role of various human activities have led to dramatically increased the pressure on the natural resources such as the available land for sustaining the livelihoods, and with over exploitation and extraction of the natural resources the ecosystems are becoming unsustainable and fragile since last century. The forest and tree cover of India is 78.92 million ha, accounting
for 24.01 per cent of the geographical area. But due to biotic disturbances such as over-grazing, deforestation, shifting cultivation and etc. also effect on regeneration of tree species inside and out side of the forest area.
Close to Nature, Permanent Commercial Forestry by Dr Jurij DiaciPro Silva Ireland
Close-to-nature forestry:
linking ecological, economical and social values by Dr Jurij Diaci, Head of Slovenian Forest Service. Presentation to Pro Silva Ireland, Wicklow, 24 April 2010
Long-term research in uneven-aged silviculture at Glentress Forest, ScotlandEdward Wilson
This poster by Edward Wilson and Philippe Morgan was first presented at the Society of American Foresters National Convention, Silviculture Matters!, North Charleston, South Carolina, 23-27 October 2013.
The poster presents an overview of the Glentress Trial, at Glentress Forest, Scotland. The trial was established by Professor M. L. Anderson in 1952 as a demonstration area for the transformation to an irregular structure of an even-aged, planted forest. The trial area (117 ha) was set out in a large commercial plantation on an exposed, upland site (~300 m); Anderson wanted to determine if uneven-aged silvicultural systems could be adopted in such locations. The dominant species include Sitka spruce, Douglas fir, European larch and Scots pine. The most important silvicultural system that has been applied is group selection, with group sizes varying from 0.1 to 0.2 ha. Groups have been restocked by planting and natural regeneration. Recent surveys of the trial area demonstrate the gradual transformation to an irregular structure after 60 years. The Glentress Trial is recognised as one of the longest-running research sites in British forestry. The trial has been important for both primary research and for developing operational experience in uneven-aged silviculture. Over the decades since its initiation, the objectives of forestry in Britain have evolved and changed. Today the Glentress Trial has a new relevance as we recognise the importance of uneven-aged forests for their ecological resilience and potential to deliver a wide range of ecosystem services.
Cathy Fitzgerald, creative practice-thesis doctoral scholar from the National College of Art & Design, Dublin, was invited by TheGallery, Bournemouth Arts University, UK to take part in a 'Text+Work' public talk on 14 Feb 2013. TheGallery's 'Text+Work' talks are designed to further developed the conversation and narrative surrounding exhibitions at TheGallery. Currently the exhibition is Jane Wilbraham's wood sculptures.
Cathy's talk was described as an 'Art in Context session on Land management' at TheGallery.
With a background in biological research and visual culture, Cathy reviewed the growing ecological crisis; discussed contemporary art & ecology practice, ecocriticism of cultural works (visual culture and nature cinema), radical permanent forest management and new national forest policy in Ireland that is moving towards permanent, non clearfell forestry. Cathy's background in these areas, have fed her arts practice that is resulting in a long term art & ecology forest project based in her immediate environment, a small woodland in rural Ireland. From this work Cathy is developing an applied, transferable philosophy of deep sustainability, rooted in actions, theory and the many lessons from the forest in which she lives.
This is just to give the information about Eco-Tourism that what is all about with one of the examples of Keoladeo National Park. This is only a starting after this you will able to find more presentations regarding the tourism & Education.
Silviculture for Smallholders: improving local forestry value chainsCIFOR-ICRAF
This presentation by James Roshetko from ICRAF given during the Forests Asia Summit in the discussion forum "Equitable development: Improving livelihood benefits for smallholders in the forestry value chain" focuses on understanding farmer systems and farmer silviculture. It shows the Farmer demo trials and recommendations as well.
Silviculture and management of ash: best practice advice for woodland manager...Edward Wilson
This presentation was prepared for the Living Ash Project Chalara Ash Dieback Workshop at Lawshall, Suffolk on 18 June 2014.
The talk aims to provide an overview of the silviculture and management of ash woodlands in Britain, where Chalara ash dieback is currently a major threat. The lecture starts with an overview of the key drivers in forestry at the present time, including the need to adapt and enhance the ecological resilience of woodlands in the face of many threats (climate change, pests, diseases). A major theme is the need to diversify the range of genotypes, species and structures of woodlands so that the risk of major damage is minimised. A large number of silvicultural practices are reviewed, and several, including planting alternative species and continuous cover forestry, are presented in more detail.
With respect to ash, a number of silvicultural and management measures have been introduced to slow the rate of infection, minimise environmental impacts and realise the value of ash timber. Practical guidance is provided, based on information from the Forestry Commission and Royal Forestry Society. In addition, there is greater need for monitoring forest conditions so that infected trees can be located as quickly as possible.
Finally, the presentation highlights the role of research and the need to identify ash trees that demonstrate a degree of tolerance or resistance to infection. These trees are an important priority for the Living Ash Project and for future ash tree breeding programmes.
The presentation includes many photographs taken in the field and supplied with acknowledgement by colleagues.
Further information on the Living Ash Project is available at www.livingashproject.org.uk. Also at the Future Trees Trust, www.futuretrees.org. General information about the biology and management of Chalara ash dieback is available from the Forestry Commission, www.forestry.gov.uk/chalara.
The slides contain a summary on my research on the ''abundances and distribution of the five most preferred food species for the mountain gorilla of the Virungas''. The presentation was delivered at the University of Twente, the Faculty of Geo-Information Science and Earth Observation (ITC). It is part of a continuous follow up on the student's research - required for the successful completion of a Master of Science at ITC, NL
Effect of planting density on leucaena leucocephala forage and Woody stems p...Agriculture Journal IJOEAR
Abstract— Lack of year round supply of forage for animal feed is common in most parts of dry lands. leucaenaleucocephala is one of most widely used dry season tree legume forage. In this study, the effect of planting density on forage and woody stems production was investigated. Three different planting spacing corresponding to (40X40 cm, 60X60 cm and 80X80 cm) were applied to tests its effects on tree growth and yield. Tree height and diameter were measured before every cutting harvest. In addition to that fresh and dry matter production of both stems and forage (tons/ha), stems, and leaves dry weight ratios over time were determined. The study revealed that different planting densities were resulted in very high significant effects on forage and stem production. Tree height was affected by planning density in most of the harvests, while diameter showed significant difference among the treatments in only one harvest. Planting trees at 40 cm distance produced higher forage yield with smaller woody stems sizes, whereas 60 and 80 cm spacing resulted in lesser forage yield, but with bigger stems size. This indicates that planting trees at closer spacing produce higher wood and forage yield, but the wood with smaller sizes. There is also, observed seasonal variation in production in which hot weather lowered yield. The stems and leaves dry matter ratio revealed that leaves production is slightly higher than stem production and were not affected by planting density. The results conclude that planting leucaena in closer spacing in arid lands will supply a considerable amount of forage as supplementary feed in addition to wood that can be used for different purposes.
Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
Alert-driven Community-based Forest monitoring: A case of the Peruvian Amazon
Silvicultural system
1. Silvicultural System (Harvesting System)
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
2. Introduction
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Need of Silvicultural System
•Systematic Management
•Decisions for ideal aimed
•Bring Forest to the normal condition
3. Definition
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•A set of Silvicultural Operations by which forest crops are tended, harvested, and replaced by new crops constitute a Silvicultural System.
•Silvicultural Operation (Any Operation for the benefit of the forest crop)
•Tended (Behave for the Crop value)
•Harvested (Systematic cutting of Forest Crop)
•Replaced (Afforestation, Refforestation, Regeneration
4. Characteristics of Slivicultural System
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•Each system must cover Whole life
•Produce stand of distinctive Form
•Maintained Soil Fertility or improve Future Yield
•Risks of damage from adverse factors (wind, insect, fungi, snow)
•Mature tree must be removed
•Adequate regeneration
5. Silvicultural System
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Silvicultural System
Coppice System
High Forest System
Coppice With Standard
Two Storeyed High Forest System
System of Concentrated Regeneration
System of Dispersed Regeneration
Selection Coppice System
Simple Coppice System
Selection System
Group Selection System
Clear Felling System
Shelterwood System
Strip System
Group System
Uniform System
Irregular Shelterwood System
6. Classification
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•Method of regeneration
7. The Selection System
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
SS of regenerating a forest stand, and maintaining an uneven-aged structure, by removing some trees in all size classes either singly, in small groups, or in steps. Types: Single tree selection system A method of creating new age classes in uneven-aged stands in which individual trees of all size classes are removed more-or-less uniformly throughout the stand to achieve desired stand structural characteristics. Group selection system A method of regenerating uneven-aged stands in which trees are removed, and new age classes are established, in small groups. The maximum width of groups is approximately twice the height of the mature trees, with small openings providing microenvironment suitable for tolerant regeneration and the larger openings providing conditions suitable for more intolerant regeneration. In the Group Selection System, the management unit or stand in which regeneration, growth, and yield are regulated consists of a landscape containing an aggregation of groups. Group Selection with Reserves A variant of the Group Selection Method in which some trees within the group are not cut to attain goals other than regeneration within the group. Overtopped: Trees of varying levels of vigor that have their crowns completely covered by the crowns of one or more neighboring trees.
8. Procedure:
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Individual trees or groups of mature, unhealthy or other selected trees are harvested periodically. Most of the trees are left to regenerate the stand naturally. Before any harvesting is done, an inventory of the forest is completed. The inventory identifies the tree species, the different sizes of trees, the quality and health of the trees and the availability of habitat in the forest. Based on this information, a tree marking prescription is written and all trees to be cut are marked with yellow paint. Crop trees are usually marked with blue paint. Crop trees are the trees you want to grow for their future commercial value, for their value to wildlife or as sources of seed for regenerating desired tree species. Every eight to 15 years, the stand is thinned to give crop trees room to grow, and some unhealthy and mature crop trees are harvested. Care is taken during the thinning and harvesting operations to avoid damaging the site and the crop trees. Damage to young and old trees can lower the future value of the wood. Road access and a good network of skid trails are important. Good access will improve the efficiency of each thinning and also minimize the damage to crop trees. The selection system can be adapted to encourage the growth of different species. Cutting individual, mature trees in the canopy encourages the growth of shade-tolerant species, such as maple, beech and hemlock, which are growing in the understorey. Cutting groups of trees, in an adaptation called the “group selection system,” encourages the growth of intolerant species, like poplar, and mid-tolerant species, like oak, basswood, cherry and white pine. The group selection system creates sunny gaps in the canopy where these species can grow.
9. RESULTS
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
This system maintains a diverse, all-aged forest with a wide range of species of different sizes and ages. These natural looking forests provide continuous supplies of wood, fuelwood and other forest products, as well as habitat for wildlife and attractive areas for recreation.
10. Applicability:
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
The selection system is well-suited to the mixed hardwood forests. Mixed hardwood forests rely on small-scale natural disturbances, such as lightning, fire, wind, ice storms and disease, to kill individual trees or groups of trees and create the space that young trees need to grow. Deodar, Fir, Spruce and Blue pine forest also in some of the chir forest.
11. BENEFITS
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
• Preserves the genetic diversity of the forest • Full canopy protects site from erosion • Maintains natural-looking, diverse forest • Provides good wildlife habitat and areas for recreation • Generates long-term income and a steady supply of wood products
12. DISADVANTAGES
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Requires investments in evaluating the forest, selecting and marking crop trees, thinning and harvesting • Assistance from forestry experts is recommended • Large areas are required to generate sufficient volumes of wood and income • Crop trees and regeneration can be damaged during harvest operations
13. FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
14. Clear Felling System
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
The clear Felling system Consists of clear felling parts of the area each year and regenerating it either naturally or artificially The area can be divided into no. of years A method of regenerating an even-aged stand in which a new age class develops in a fully exposed microclimate after removal, in a single cubing, of all trees in the previous stand. Regeneration is from natural seeding, direct seeding, planted seedlings, and/or advance reproduction. Cutting may be done in groups or patches (Group or Patch Clearcutting), or in strips (Strip Clearcutting). In the Clearcutting System, the management unit or stand in which regeneration, growth, and yield are regulated consists of the individual clearcut stand (see Group Selection). When the primary source of regeneration is advance reproduction, the preferred term is Overstory Removal.
15. Block-clear felling system
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
When the area is large you adopt the Block clear felling system for sustainable yield production.
e.g If you have 50 compartment and the rotation period of the species is 50 years then number of block you felled in a year is
Felling Block=Number of compartments / Rotation Age =1
16. Clear strip system
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•In this method we divide the area into strips and the felling practice done in these strips.
17. Clear felling with alternate strip system:
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
The area is divided as in the clear strip system but alternate strips are cut down in the felling time. Procedure: All the trees are harvested in one cutting operation. In a modification of the clearcut system, called the “seed-tree method,” individual trees or groups of trees are left standing to provide seed for regeneration. The seed trees are large- crowned (capable of producing large quantities of seeds) and able to survive in windy, exposed conditions. The clear-cut area can be regenerated by: • Windborne seeds from nearby areas • Seeds from trees left on the site, singly, in strips or in groups • Coppice growth (the shoots that grow from the stumps of trees when they are cut or stressed) • Artificial seeding • Planting seedlings or trees You may need to thin the regenerating forest and protect the young trees from competition with other vegetation and from small mammals.
18. RESULTS
FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Clear cutting produces an even-aged forest with trees that are about the same age. Although maple and other shade tolerant species can become established in clearcut areas, Clear cutting strongly favors the growth of shade intolerant species, like jack pine, poplar, cedar and white birch. These species, which need full sunlight, grow fast and quickly dominate clearcut areas.
19. FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
20. Applicability:
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Clear cutting is a good choice for the irrigated plantation and riverain forests, Where it give little disturbance to eco system. Clearcut system regenerates forest naturally to even-aged growth. Clear cutting is not recommended for general use in the mixed hardwood forests.
21. BENEFITS
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
• Simplest harvest method with no need to protect remaining seed-trees from damage • Generates highest immediate financial returns • Favors intolerant species, which do not grow well in shade DISADVANTAGES • Makes land more vulnerable to erosion from wind and rain • Erosion can carry silt into streams and rivers, reducing water quality and damaging aquatic habitats • Regeneration in hot, exposed areas can be difficult and may require investments in preparing the site for seeding or planting, thinning, controlling competition and protecting young trees from small mammals • Can reduce the genetic diversity of the tree species in the new forest if the seed came from a few seed trees • Unpleasant to look at and of little value for recreation
22. SHELTERWOOD SYSTEM (Also Called Controlled by Area)
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
A method of regenerating an even-aged stand in which a new age class develops beneath the moderated microenvironment provided by the residual trees. The sequence of treatments can include three distinct types of cuttings: (1) an optional preparatory cut to enhance conditions for seed production; (2) an establishment cut to prepare the seed bed and to create a new age class; and (3) a removal cut to release established regeneration from competition with the overwood. Cutting may be done uniformly throughout the stand (Uniform Shelterwood), in groups or patches (Group Shelterwood), or in strips (Strip Shelterwood).
23. Types of Shelterwood System
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Uniform Shelterwood System. As the uniform opening of canopy over the whole area of the compartment with a view to obtain more less uniform regeneration. Group Shelterwood system. In this system regeneration of a compartment is started from natural foci or groups of advance growth or where such foci do not exist, by artificial created foci. Shelterwood Strip System: Felling is done in strips and after number of years enlarge the strips. Irregular Shelterwood System: Modification of Shelterwood selection system, retained the advance growth up to 16″ I Deodar, 12″ in Chir pine (That is also called Punjab Shelterwood system)
24. Periodic Blocks (P Bs)
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
According to the length of the regeneration period, the forest may be divided on the basis of age classes into what are known as Periodic Blocks.
S.No
P Bs
Age of crop
Activity
1.
PBI
90-120
Felling/ Regeneration
2.
PBII
60-90
Thinning + Preparatory Felling
3.
PBIII
30-60
Thinning
4.
PBIV
0-30
Regeneration/Seedling/Cleaning/ Also Final felling if require in regeneration
25. Procedure
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
Mature trees are harvested in a series of two or more partial cuts. The cuts stimulate the germination and rapid growth of a new forest in the shelter and the shade of mature trees. The mature trees usually provide seed for regenerating the site, but sometimes regeneration is achieved by seeding, planting or stimulating coppice growth. You will need good roads and skid trails to access the site to complete each harvest. Care is taken at each harvest not to damage the site or the regeneration. This system can involve three different kinds of harvests:
26. Procedure Contn……
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
1. Preparatory cut The preparatory cut is a thinning operation that gives selected trees room to grow large crowns. Trees with large crowns provide more seeds than trees with small crowns. A preparatory cut is only done if there is a shortage of trees with large crowns on the site. The first harvest is usually done when the trees are 60 to 80 years old. 2. Seed cut The seed cut removes about half the mature trees in the stand. It opens up the stand, allowing sunlight to reach the forest floor, where it stimulates the germination and growth of seedlings. The second harvest is usually done when the trees are 80 to 100 years old. 3. Removal cut The removal cut harvests all the mature trees. It can be done as a single harvest or as a series of partial harvests. The removal cut is conducted after a dense carpet of saplings (trees taller than 1.5 meters) is established in the shelter of the mature trees. By giving the saplings full sunlight, the removal cut encourages the rapid growth of a new forest. The final harvest is usually done when the trees are 100 to 120 years old.
27. FORESTER’S
By Javed Iqbal PhD Scholar Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
28. RESULTS
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
The Shelterwood system produces an even-aged, fast-growing forest. It favors mid-tolerant species, such as oak, white ash and white pine, which can germinate in shade but later require some sunshine to survive. This system can be adapted to quickly regenerate maple sugar bushes. Applicability: This system is well-suited to mixed hardwood and conifer forests. The area where lack of sufficient natural regeneration to grow desired species. The Shelterwood system mimics major disturbances, like wind, fire and insects, which create large gaps in the forest canopy where mid-tolerant species can grow.
29. BENEFITS
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
• Preserves the genetic diversity of the forest • Partial canopy protects site from erosion while new growth is getting established • Maintains some wildlife habitat • Can be used to regenerate oaks which provide food for wildlife DISADVANTAGES • Requires investments in evaluating the forest, selecting and marking crop trees, thinning and harvesting • Assistance from forestry experts is recommended • Can cause loss of habitat for animals that require a mature closed canopy
30. ACCESSORY SYSTEMS:
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•These systems are applicable in special areas Also Called Special Silviculture systems.
•Two Stories High Forest Systems.
•The two stories High Forest of a crop arranges in the different stories on above the other being approximately even aged and Seed origin as opposite of Coppice.
•Natural Double stories forest is found in Chir Pine +Oak.
•In Plantation, Shisham and mulberry are two stories, Mulberry is planted after its thinning.
31. COPPICE SYSTEM
FORESTER’S
By Javed Iqbal PhD Scholar
Department of Silviculture, Faculty of Forestry and Wood Sc, Czech University of Life Sciences, Prague
•When regeneration is principally from coppice shoots or root suckers the Silvicultural system is known as the coppice system.
•The system is usually adopted for hardwoods when small dimensional stock is required for firewood, basket manufacture, small poles etc. the system is also adopted on arid eroded slopes subject to heavy grazing where natural regeneration is scanty and 100% artificial regeneration is not economic. Types of Coppice system
•Simple coppice system
•Selection coppice system
•Coppice with standards system