Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir
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Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir
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Author : Richard E. Miller
language : en
Publisher:
Release Date : 2004
Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir written by Richard E. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Douglas fir categories.
Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir
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Author : Richard E. Miller
language : en
Publisher:
Release Date : 2004
Tree Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir written by Richard E. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Douglas fir categories.
The 1925 Wind River spacing test is the earliest field trial seeking to determine the most appropriate spacing for planting Douglas-fir. Spacing treatments were not replicated, although individual spacings were subsampled by two to four tree-measurement plots. Previously, greater growth occurred at the wider spacings (10 and 12 ft) than at the closer spacings (4, 5, 6, and 8 ft). We considered three possible explanations: (1) close spacing eventually retarded growth, (2) soil quality may be better in the 10- and 12-ft spacings than at closer spacings, and (3) tree spacing and soil quality combined affected growth. To test these explanations, we (1) measured and mapped several site factors (topographic relief, depth to bedrock, and soil properties) and (2) related these factors to tree and stand growth. We infer from the strong correlation between spacing and soil variables that the influence of soil and spacing cannot be separated; differences in soil depth and available water capacity confound spacing effects and vice versa. Because soils in the wider spacings are generally deeper and have more available water capacity than do soils in the closer spacings, we conclude that some of the superior tree growth attained in the 10-and 12-ft spacings is due to more favorable soil conditions. Visual comparisons of tree size, however, suggest that spacing is probably the stronger factor affecting tree growth at this location.
Three Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir
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Author : United States Department of Agriculture
language : en
Publisher: CreateSpace
Release Date : 2015-06-26
Three Growth And Soil Relations At The 1925 Wind River Spacing Test In Coast Douglas Fir written by United States Department of Agriculture and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-26 with categories.
The 1925 Wind River spacing test is the earliest field trial seeking to determine the most appropriate spacing for planting Douglas-fir. Spacing treatments were not replicated, although individual spacings were subsampled by two to four tree-measurement plots. Previously, greater growth occurred at the wider spacings (10 and 12 ft) than at the closer spacings (4, 5, 6, and 8 ft). We considered three possible explanations: (1) close spacing eventually retarded growth, (2) soil quality may be better in the 10- and 12-ft spacings than at closer spacings, and (3) tree spacing and soil quality combined affected growth. To test these explanations, we (1) measured and mapped several site factors (topographic relief, depth to bedrock, and soil properties) and (2) related these factors to tree and stand growth. We infer from the strong correlation between spacing and soil variables that the influence of soil and spacing cannot be separated; differences in soil depth and available water capacity confound spacing effects and vice versa. Because soils in the wider spacings are generally deeper and have more available water capacity than do soils in the closer spacings, we conclude that some of the superior tree growth attained in the 10- and 12-ft spacings is due to more favorable soil conditions. Visual comparisons of tree size, however, suggest that spacing is probably the stronger factor affecting tree growth at this location.
Research Paper Pnw
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Author :
language : en
Publisher:
Release Date : 1978
Research Paper Pnw written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Forests and forestry categories.
Relation Of Initial Spacing And Relative Stand Density Indices To Stand Characteristics In A Douglas Fir Plantation Spacing Trial
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Author : Robert O. Curtis
language : en
Publisher:
Release Date : 2016
Relation Of Initial Spacing And Relative Stand Density Indices To Stand Characteristics In A Douglas Fir Plantation Spacing Trial written by Robert O. Curtis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Douglas fir categories.
Aiming For Healthy Forests
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Author : Andrew B. Carey
language : en
Publisher:
Release Date : 2007
Aiming For Healthy Forests written by Andrew B. Carey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Adaptive natural resource management categories.
A Manual For Dryland Afforestation And Management
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Author : G. Singh
language : en
Publisher: Scientific Publishers - AFARI
Release Date : 2017-01-01
A Manual For Dryland Afforestation And Management written by G. Singh and has been published by Scientific Publishers - AFARI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-01 with Technology & Engineering categories.
Community-oriented conservation of natural resources and promotion and protection of trees in drylands are examples to deal with climatic adversities. This book provides knowledge on climatic, ecological, social and economic condition of dry areas and lay out approaches and strategies to restore degraded lands. There are 15 chapters and first five deals with physiography of Rajasthan, drylands ecology, problems of land degradation, its economic evaluation and the approaches and strategies of restoration and rehabilitation. Next two chapters describe the problems of sand drift, salinity, water logging and effluent inflicted areas and strategies to control them. Chapters 8-10 deal with seed production, quality planting materials, genetic improvement, propagation and planting techniques. Chapters 11-12 describe methods of rain water harvesting and irrigation, and resources conservation for seed sowing and favouring regeneration and successions. Effective management of pests/diseases in nurseries and plantation, growth and yield prediction equations and models, and people's perception and participation in managing forest resources have been described in last 3 chapters. Purpose of this publication is to strengthen the forest functionaries and readers with wide ranging knowledge on land degradation, desertification and eco-biology of drylands; and methods to restore and rehabilitate degrading forest (lands) to increase forest cover, enhance resilience and people livelihoods and improve environmental conditions. Academician, researchers, forest managers, non-government organizations, extension agents and environmentalists can use it in developing, conserving and managing drylands ecosystems for its long lasting beneficial effects. This book is also useful to policy makers in effective planning of restoring, protecting and conserving dryland's ecological and socioeconomic services.
Some Recent Developments In The Wind River Douglas Fir Plantation Spacing Tests
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Author : Donald L. Reukema
language : en
Publisher:
Release Date : 1959
Some Recent Developments In The Wind River Douglas Fir Plantation Spacing Tests written by Donald L. Reukema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with categories.
Silviculture And Ecology Of Western U S Forests
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Author : John C. Tappeiner
language : en
Publisher:
Release Date : 2007
Silviculture And Ecology Of Western U S Forests written by John C. Tappeiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Nature categories.
"An essential reference for forest managers, policy makers, forest scientists, and students, this authoritative volume provides a basis for silviculture practices and contemporary management of western forests."--BOOK JACKET.
Fifty Year Development Of Douglas Fir Stands Planted At Various Spacings
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Author : Donald L. Reukema
language : en
Publisher:
Release Date : 1979
Fifty Year Development Of Douglas Fir Stands Planted At Various Spacings written by Donald L. Reukema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Douglas fir categories.