Some Recent Developments In The Wind River Douglas Fir Plantation Spacing Tests
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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.
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.
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.
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.
Investigating Dominance In Douglas Fir Stands
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Author : Kenneth William Krueger
language : en
Publisher:
Release Date : 1967
Investigating Dominance In Douglas Fir Stands written by Kenneth William Krueger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Douglas fir categories.
Usda Forest Service Research Paper Pnw
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Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
language : en
Publisher:
Release Date : 1969
Usda Forest Service Research Paper Pnw written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Forests and forestry categories.
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.
Report
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Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
language : en
Publisher:
Release Date : 1952
Report written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1952 with Forests and forestry categories.
Usda Forest Service Research Paper Pnw
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Author :
language : en
Publisher:
Release Date : 1970
Usda Forest Service 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 1970 with Forests and forestry categories.
Research Notes
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Author :
language : en
Publisher:
Release Date : 1959
Research Notes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Forests and forestry categories.