Mike Strub - Academia.edu (original) (raw)
Papers by Mike Strub
Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS), Mar 30, 2021
Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS), Mar 30, 2021
The contribution of field data and financial assistance for this study by the Chesapeake Corporat... more The contribution of field data and financial assistance for this study by the Chesapeake Corporation of Virginia, Continental Can Company, Inc., Glatfelter Pulp Wood Company, Southern Johns-Manville Products Corporation, and Union Camp Corporation is gratefully acknowledged.
Forest Science, Mar 1, 1975
Forest science, 1989
... PETER T. SPP. INZ CHERYL B. TALBERT MIKE R. STRUB ... Quan-tiffcation of height-growth patter... more ... PETER T. SPP. INZ CHERYL B. TALBERT MIKE R. STRUB ... Quan-tiffcation of height-growth patterns over time for genetically different pop-ulations is not only important for evaluation of early selection based on height, but also for projection of long-term genetic gains. ...
Journal of Forestry, Sep 1, 1979
... The stand model of Burkhart and Strub (1974) is based on a diameter-distribution analysis. ..... more ... The stand model of Burkhart and Strub (1974) is based on a diameter-distribution analysis. ... o oo 0 4oo 1400 2400 ,400 4400 5400 6400 7400 DIAMETER DISTRIBUTION YIELD ESTIMATE (CU.FT./AG.) ... BURKHART, HE 1977. Stand modeling for mdiata pine in New Zealand. ...
Southern Journal of Applied Forestry, 2009
Recent advances in laser technology help make possible accurate and affordable measurements of up... more Recent advances in laser technology help make possible accurate and affordable measurements of upper-stem diameters. These measurements can be used to calibrate results from a taper equation to improve the accuracy of diameter predictions along the tree bole. Felled-tree data from a loblolly pine (Pinus taeda L.) plantation were used to evaluate two methods for calibrating outputs from a segmented taper equation with parameters either obtained from the data in this study or originally published by Max and Burkhart (1976, Segmented polynomial regression applied to taper equations, For. Sci. 22:283–289). For outside-bark diameters, although a simple calibration for dbh gave desirable results, a better calibration involving both dbh and an upper-stem diameter provided significant improvements in predicting tree taper. Results varied depending on where the diameter was measured, with optimum gains obtained when the upper-stem diameter was measured at the midpoint between breast height a...
Southern Journal of Applied Forestry, 2009
About 30 forest biometricians, modelers, and statisticians from Canada, Chile, and the United Sta... more About 30 forest biometricians, modelers, and statisticians from Canada, Chile, and the United States participated in the conference. The conference participants presented 30 papers on various topics organized in the following groups: Forest biometrics and modeling, Inventory and sampling methods, Self-referencing functions and parameter estimation methods, Wood quality, Forest management, and Cooperatives and collaboration opportunities. This was the ninth Southern Mensurationists Conference since the beginning of the group in 1999 when the Southern Mensurationists held their first event on Jekyll Island, GA. The Southern Mensurationists Conferences rotate their locations among different states. Previous conferences were held in Georgia,
Southern Journal of Applied Forestry, 2009
Analysis of covariance methods applied to long-term loblolly pine spacing trial growth data showe... more Analysis of covariance methods applied to long-term loblolly pine spacing trial growth data showed that the orientation of rows with regard to a particular azimuth direction had no significant impact on either basal area or dominant height growth through the age of 20 years. Results were consistent for a range of planting densities and spacings and across a range of ages that included very young ages before crown closure. These results suggest that for loblolly pine growing in the Piedmont and Coastal Plain areas of Virginia and North Carolina, the selection of row orientation at plantation establishment can be made based on criteria other than growth.
Silva Fennica, 2016
We determined empirical models for estimating total aboveground as well as stem, branches, and fo... more We determined empirical models for estimating total aboveground as well as stem, branches, and foliage dry biomass of young (age up to 16 years) silver birch (Roth.) growing on the post-agricultural lands. Two sets of allometric models for trees with a height below or above 1.3 m (small and large trees respectively) were developed. Simplified models were elaborated based exclusively on appropriate tree diameter (diameter at ground level for small trees, diameter at breast height for large trees), while expanded models also included tree height. Total aboveground biomass was estimated as the sum of biomass of all tree components. To assure additivity of the developed equations, the seemingly unrelated regression approach for the final model fitting was used. Expanded models in both tree groups were characterized by a better fit to the data (Rfor total aboveground biomass for small and large trees equaled 0.8768 and 0.9752, respectively). Diameter at breast height appeared to be a bet...
Forestry Sciences, 1991
The best initial spacing at which to plant the southern pines is primarily a function of the prod... more The best initial spacing at which to plant the southern pines is primarily a function of the product desired and is based on both biological and operational factors. Long-term spacing studies over a wide range of initial densities and tree species demonstrate that for rotations beyond approximately 20 years, initial density has little effect on total net wood yield. However, it has a pronounced effect on product size and distribution, value, cost and on harvesting and cultural treatments. Planting seedlings on 2.4 x 2.4 to 3.0 x 3.0 m or equivalent spacing provides good flexibility for plantation management under most landowner objectives and current market conditions.
Stand density management is a powerful silvicultural tool for manipulating stand volumes, but it ... more Stand density management is a powerful silvicultural tool for manipulating stand volumes, but it has the potential to alter key wood properties. At a site in northcentral Louisiana, five density management regimes were conducted over a 45-year period. At age 49, a stratified sample of trees was destructively harvested for crown length, taper, and specific gravity determination. No differences among these tree and wood characteristics were found, suggesting that forest managers have great flexibility in density management options for such a site from a wood quality perspective.
Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS), Mar 30, 2021
Mathematical and Computational Forestry & Natural-Resource Sciences (MCFNS), Mar 30, 2021
The contribution of field data and financial assistance for this study by the Chesapeake Corporat... more The contribution of field data and financial assistance for this study by the Chesapeake Corporation of Virginia, Continental Can Company, Inc., Glatfelter Pulp Wood Company, Southern Johns-Manville Products Corporation, and Union Camp Corporation is gratefully acknowledged.
Forest Science, Mar 1, 1975
Forest science, 1989
... PETER T. SPP. INZ CHERYL B. TALBERT MIKE R. STRUB ... Quan-tiffcation of height-growth patter... more ... PETER T. SPP. INZ CHERYL B. TALBERT MIKE R. STRUB ... Quan-tiffcation of height-growth patterns over time for genetically different pop-ulations is not only important for evaluation of early selection based on height, but also for projection of long-term genetic gains. ...
Journal of Forestry, Sep 1, 1979
... The stand model of Burkhart and Strub (1974) is based on a diameter-distribution analysis. ..... more ... The stand model of Burkhart and Strub (1974) is based on a diameter-distribution analysis. ... o oo 0 4oo 1400 2400 ,400 4400 5400 6400 7400 DIAMETER DISTRIBUTION YIELD ESTIMATE (CU.FT./AG.) ... BURKHART, HE 1977. Stand modeling for mdiata pine in New Zealand. ...
Southern Journal of Applied Forestry, 2009
Recent advances in laser technology help make possible accurate and affordable measurements of up... more Recent advances in laser technology help make possible accurate and affordable measurements of upper-stem diameters. These measurements can be used to calibrate results from a taper equation to improve the accuracy of diameter predictions along the tree bole. Felled-tree data from a loblolly pine (Pinus taeda L.) plantation were used to evaluate two methods for calibrating outputs from a segmented taper equation with parameters either obtained from the data in this study or originally published by Max and Burkhart (1976, Segmented polynomial regression applied to taper equations, For. Sci. 22:283–289). For outside-bark diameters, although a simple calibration for dbh gave desirable results, a better calibration involving both dbh and an upper-stem diameter provided significant improvements in predicting tree taper. Results varied depending on where the diameter was measured, with optimum gains obtained when the upper-stem diameter was measured at the midpoint between breast height a...
Southern Journal of Applied Forestry, 2009
About 30 forest biometricians, modelers, and statisticians from Canada, Chile, and the United Sta... more About 30 forest biometricians, modelers, and statisticians from Canada, Chile, and the United States participated in the conference. The conference participants presented 30 papers on various topics organized in the following groups: Forest biometrics and modeling, Inventory and sampling methods, Self-referencing functions and parameter estimation methods, Wood quality, Forest management, and Cooperatives and collaboration opportunities. This was the ninth Southern Mensurationists Conference since the beginning of the group in 1999 when the Southern Mensurationists held their first event on Jekyll Island, GA. The Southern Mensurationists Conferences rotate their locations among different states. Previous conferences were held in Georgia,
Southern Journal of Applied Forestry, 2009
Analysis of covariance methods applied to long-term loblolly pine spacing trial growth data showe... more Analysis of covariance methods applied to long-term loblolly pine spacing trial growth data showed that the orientation of rows with regard to a particular azimuth direction had no significant impact on either basal area or dominant height growth through the age of 20 years. Results were consistent for a range of planting densities and spacings and across a range of ages that included very young ages before crown closure. These results suggest that for loblolly pine growing in the Piedmont and Coastal Plain areas of Virginia and North Carolina, the selection of row orientation at plantation establishment can be made based on criteria other than growth.
Silva Fennica, 2016
We determined empirical models for estimating total aboveground as well as stem, branches, and fo... more We determined empirical models for estimating total aboveground as well as stem, branches, and foliage dry biomass of young (age up to 16 years) silver birch (Roth.) growing on the post-agricultural lands. Two sets of allometric models for trees with a height below or above 1.3 m (small and large trees respectively) were developed. Simplified models were elaborated based exclusively on appropriate tree diameter (diameter at ground level for small trees, diameter at breast height for large trees), while expanded models also included tree height. Total aboveground biomass was estimated as the sum of biomass of all tree components. To assure additivity of the developed equations, the seemingly unrelated regression approach for the final model fitting was used. Expanded models in both tree groups were characterized by a better fit to the data (Rfor total aboveground biomass for small and large trees equaled 0.8768 and 0.9752, respectively). Diameter at breast height appeared to be a bet...
Forestry Sciences, 1991
The best initial spacing at which to plant the southern pines is primarily a function of the prod... more The best initial spacing at which to plant the southern pines is primarily a function of the product desired and is based on both biological and operational factors. Long-term spacing studies over a wide range of initial densities and tree species demonstrate that for rotations beyond approximately 20 years, initial density has little effect on total net wood yield. However, it has a pronounced effect on product size and distribution, value, cost and on harvesting and cultural treatments. Planting seedlings on 2.4 x 2.4 to 3.0 x 3.0 m or equivalent spacing provides good flexibility for plantation management under most landowner objectives and current market conditions.
Stand density management is a powerful silvicultural tool for manipulating stand volumes, but it ... more Stand density management is a powerful silvicultural tool for manipulating stand volumes, but it has the potential to alter key wood properties. At a site in northcentral Louisiana, five density management regimes were conducted over a 45-year period. At age 49, a stratified sample of trees was destructively harvested for crown length, taper, and specific gravity determination. No differences among these tree and wood characteristics were found, suggesting that forest managers have great flexibility in density management options for such a site from a wood quality perspective.