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Filtering by: Contributor advisor sim Marshall, David D.

Simultaneous equation estimation for individual tree growth in young Southern Oregon and Northern California conifer plantations

Creator:

Hamann, Jeff D.

Abstract:

This thesis presents methods for obtaining asymptotically efficient and consistent parameters and variance estimates for simultaneous equations in a forest growth modelling context. Ordinary Least Squares (OLS), Seemingly Unrelated Regressions (SUR), Two-Stage Least Squares (2SLS) and Three- Stage Least Squares (3SLS) are presented for linear models. The variables, model types...

Resource Type:

Masters Thesis
Development of Douglas-fir log quality, product yield, and stand value after repeated thinnings in western Oregon

Creator:

Christensen, Glenn A.

Abstract:

Forest managers are beginning to take an interest in management of young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in Western Oregon and Washington. Studies have established the relationship between growth and levels-of-growing-stock but few have established a link to wood quality and value. This study used data collected from a long...

Resource Type:

Masters Thesis
Distribution and growth of advance Douglas-fir regeneration in commercially thinned stands in the Oregon Coast Range

Creator:

Beer, Louis W.

Abstract:

This study examined the abundance, size, growth, and age of advance regeneration Douglas-fir, beneath an eighty year-old overstory at a single site on plots subjected to different overstory thinning treatments. Treatments consisted of keeping overstory basal area within upper and lower limits for periods of 12-17 years which, depending upon...

Resource Type:

Masters Thesis