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• 1. [Article] Management experiments for high-elevation agroforestry systems jointly producing matsutake mushrooms and high-quality timber in the Cascade Range of southern Oregon

  Experimental prescriptions compare agroforestry systems designed to increase financial returns from high-elevation stands in the southern Oregon Cascade Range. The prescriptions emphasize alternative approaches ...

  Citation × Citation Citation Abstract Copy Title: Management experiments for high-elevation agroforestry systems jointly producing matsutake mushrooms and high-quality timber in the Cascade Range of southern Oregon Author: Weigand, James F. Experimental prescriptions compare agroforestry systems designed to increase financial returns from high-elevation stands in the southern Oregon Cascade Range. The prescriptions emphasize alternative approaches for joint production of North American matsutake mushrooms (also known as North American pine mushrooms; Tricholoma magnivelare) and high-quality timber. Other agroforestry byproducts from the system are ornamental conifer boughs, pine cones, and Christmas trees. Management practices concentrate on increasing the physiological efficiency and vigor of trees, and on altering leaf area index, tree species composition, and stand age-class structure to increase matsutake reproduction. Programs of thinning and branch pruning test regulating flows of energy and moisture to mushroom mycelia in the upper soil. Experimental prescriptions incorporate monitoring to evaluate ecosystem responses to management and to accelerate adaptive learning. Title: Management experiments for high-elevation agroforestry systems jointly producing matsutake mushrooms and high-quality timber in the Cascade Range of southern Oregon Author: Weigand, James F. Experimental prescriptions compare agroforestry systems designed to increase financial returns from high-elevation stands in the southern Oregon Cascade Range. The prescriptions emphasize alternative approaches for joint production of North American matsutake mushrooms (also known as North American pine mushrooms; Tricholoma magnivelare) and high-quality timber. Other agroforestry byproducts from the system are ornamental conifer boughs, pine cones, and Christmas trees. Management practices concentrate on increasing the physiological efficiency and vigor of trees, and on altering leaf area index, tree species composition, and stand age-class structure to increase matsutake reproduction. Programs of thinning and branch pruning test regulating flows of energy and moisture to mushroom mycelia in the upper soil. Experimental prescriptions incorporate monitoring to evaluate ecosystem responses to management and to accelerate adaptive learning. Close

• 2. [Article] Growth and yield of western larch under controlled levels of stocking in the Blue Mountains of Oregon

  Repeated thinning to five growing-stock levels resulted in widely differing tree sizes and volumes per acre after 30 years. Largest trees but the least cubic-volume yield per acre were produced in the ...

  Citation × Citation Citation Abstract Copy Title: Growth and yield of western larch under controlled levels of stocking in the Blue Mountains of Oregon Author: Cochran, P.H. Repeated thinning to five growing-stock levels resulted in widely differing tree sizes and volumes per acre after 30 years. Largest trees but the least cubic-volume yield per acre were produced in the heaviest thinning level, whereas highest board-foot yields were found in intermediate thinning levels. partial defoliation by larch casebearer (Coleophora Iaricella Hubner), drought, and top damage from ice occurred, and site trees grew less in height than expected during the 30-year study. Curvilinear increases in periodic annual increments of both basal area and cubic volume generally occurred with increasing stand density, but increments dropped off at the highest stand densities for some periods. Anticipated patterns for these increments were found after fitting a model that included stand density index, height increments of site trees, and dummy variables for periods as independent variables. heavy thinning did not increase the age of culmination of cubic-volume means annual increment as expected. Thinning stands of larch to densities as low as 50 percent of 'normal' results in little loss of basal-area growth, a moderate loss in volume production, and a large increase in tree diameter. Thinning is necessary in many larch stands to maintain vigorous, rapidly growing trees. Title: Growth and yield of western larch under controlled levels of stocking in the Blue Mountains of Oregon Author: Cochran, P.H. Repeated thinning to five growing-stock levels resulted in widely differing tree sizes and volumes per acre after 30 years. Largest trees but the least cubic-volume yield per acre were produced in the heaviest thinning level, whereas highest board-foot yields were found in intermediate thinning levels. partial defoliation by larch casebearer (Coleophora Iaricella Hubner), drought, and top damage from ice occurred, and site trees grew less in height than expected during the 30-year study. Curvilinear increases in periodic annual increments of both basal area and cubic volume generally occurred with increasing stand density, but increments dropped off at the highest stand densities for some periods. Anticipated patterns for these increments were found after fitting a model that included stand density index, height increments of site trees, and dummy variables for periods as independent variables. heavy thinning did not increase the age of culmination of cubic-volume means annual increment as expected. Thinning stands of larch to densities as low as 50 percent of 'normal' results in little loss of basal-area growth, a moderate loss in volume production, and a large increase in tree diameter. Thinning is necessary in many larch stands to maintain vigorous, rapidly growing trees. Close

• 3. [Article] Softwood lumber prices for evaluation of small-diameter timber stands in the Intermountain West

  This paper reports prices for aggregations of lumber grades that are representative of the quality and volume of lumber produced from small-diameter timber stands in the Intermountain West area encompassing ...

  Citation × Citation Citation Abstract Copy Title: Softwood lumber prices for evaluation of small-diameter timber stands in the Intermountain West Author: Barbour, R. James, Fight, Roger D., Chmelik, John T., Forest Products Laboratory (U.S.) This paper reports prices for aggregations of lumber grades that are representative of the quality and volume of lumber produced from small-diameter timber stands in the Intermountain West area encompassing Idaho and Montana and land east of the Cascade Mountain range in Oregon and Washington. Price data are reported for Douglas Fir-Larch, Hem-Fir, ponderosa pine, and lodgepole pine. Forest managers can use the grade aggregates in conjunction with the Financial Evaluation of Ecosystem Management Activities (FEEMA) software to evaluate silvicultural treatment for small-diamter timber stands. Title: Softwood lumber prices for evaluation of small-diameter timber stands in the Intermountain West Author: Barbour, R. James, Fight, Roger D., Chmelik, John T., Forest Products Laboratory (U.S.) This paper reports prices for aggregations of lumber grades that are representative of the quality and volume of lumber produced from small-diameter timber stands in the Intermountain West area encompassing Idaho and Montana and land east of the Cascade Mountain range in Oregon and Washington. Price data are reported for Douglas Fir-Larch, Hem-Fir, ponderosa pine, and lodgepole pine. Forest managers can use the grade aggregates in conjunction with the Financial Evaluation of Ecosystem Management Activities (FEEMA) software to evaluate silvicultural treatment for small-diamter timber stands. Close

• 4. [Article] Composition, volume, and prices for major softwood lumber types in western Oregon and Washington, 1971-2020

  An analysis of lumber prices provided regressions for price trends during the period 1971-95 for composite lumber grades of major timber species found in the Pacific Northwest west of the crest of the ...

  Citation × Citation Citation Abstract Copy Title: Composition, volume, and prices for major softwood lumber types in western Oregon and Washington, 1971-2020 Author: Pacific Northwest Research Station (Portland, Or.), Weigand, James F. An analysis of lumber prices provided regressions for price trends during the period 1971-95 for composite lumber grades of major timber species found in the Pacific Northwest west of the crest of the Cascade Range. The analysis included data for coastal Douglas-fir and hem-fir lumber; coastal and inland Pacific Northwest ponderosa, sugar, and western white pines; and inland Pacific Northwest and Rocky Mountain lodgepole pine. Future prices of grades by species group are based on these price trends and the latest average regional lumber values established in the Timber Assessment Market Model (TAMM). Land managers can use the price projections in financial analyses of management practices that are designed to affect the quality of timber resources. Title: Composition, volume, and prices for major softwood lumber types in western Oregon and Washington, 1971-2020 Author: Pacific Northwest Research Station (Portland, Or.), Weigand, James F. An analysis of lumber prices provided regressions for price trends during the period 1971-95 for composite lumber grades of major timber species found in the Pacific Northwest west of the crest of the Cascade Range. The analysis included data for coastal Douglas-fir and hem-fir lumber; coastal and inland Pacific Northwest ponderosa, sugar, and western white pines; and inland Pacific Northwest and Rocky Mountain lodgepole pine. Future prices of grades by species group are based on these price trends and the latest average regional lumber values established in the Timber Assessment Market Model (TAMM). Land managers can use the price projections in financial analyses of management practices that are designed to affect the quality of timber resources. Close

• 5. [Article] Lodgepole pine development after early spacing in the Blue Mountains of Oregon

  Seedlings were thinned to spacings of 5, 9, 12, 15, and 18 feet and measured periodically. Twenty-seven years after treatment, quadratic mean diameters increased curvilinearity (p < or = 0.05) as spacing ...

  Citation × Citation Citation Abstract Copy Title: Lodgepole pine development after early spacing in the Blue Mountains of Oregon Author: Dahms, Walter G., Cochran, P.H. Seedlings were thinned to spacings of 5, 9, 12, 15, and 18 feet and measured periodically. Twenty-seven years after treatment, quadratic mean diameters increased curvilinearity (p < or = 0.05) as spacing increased, but total height did not differ significantly (p < or = 0.05) with spacing. Corresponding basal areas decreased curvilinearly (p < or = 0.05), and cubic volumes decreased linearly (p < or = 0.05) as spacing increased. All periodic annual increments differed with period or age. Periodic annual increments for mean diameter and basal area varied curvilinearly (p < or = 0.05), whereas volume increments varied linearly (p < or = 0.05) with spacing for each period. Height increments were greatest at intermediate spacing during some periods, at wide spacings during other periods, and at the narrowest spacing during one period. Crown widths increased (p < or = 0.05) as spacing widended. Fifty percent crown cover as attained at a stand density index of about 80 for all spacings. Simulation to a breast high age of 100 years indicated that most merchantable cubic volume was produced at the 6-foot spacing but that the 12-, 15-, and 18-foot spacings produced about the same board-foot volume. Title: Lodgepole pine development after early spacing in the Blue Mountains of Oregon Author: Dahms, Walter G., Cochran, P.H. Seedlings were thinned to spacings of 5, 9, 12, 15, and 18 feet and measured periodically. Twenty-seven years after treatment, quadratic mean diameters increased curvilinearity (p < or = 0.05) as spacing increased, but total height did not differ significantly (p < or = 0.05) with spacing. Corresponding basal areas decreased curvilinearly (p < or = 0.05), and cubic volumes decreased linearly (p < or = 0.05) as spacing increased. All periodic annual increments differed with period or age. Periodic annual increments for mean diameter and basal area varied curvilinearly (p < or = 0.05), whereas volume increments varied linearly (p < or = 0.05) with spacing for each period. Height increments were greatest at intermediate spacing during some periods, at wide spacings during other periods, and at the narrowest spacing during one period. Crown widths increased (p < or = 0.05) as spacing widended. Fifty percent crown cover as attained at a stand density index of about 80 for all spacings. Simulation to a breast high age of 100 years indicated that most merchantable cubic volume was produced at the 6-foot spacing but that the 12-, 15-, and 18-foot spacings produced about the same board-foot volume. Close