Index Catalog // ScholarsArchive@OSU

Enhanced diameter-growth-rate equations for undamaged and damaged trees in southwest Oregon

Creator:: Hann, David W., Hanus, Mark L., and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting the 5-yr diameter-growth rate of a tree are presented for eight conifer and nine hardwood tree species from southwest Oregon. Equation parameters for undamaged and damaged trees combined were estimated by weighted nonlinear regression. The resulting equation for Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] explained more than 71%...
Resource Type:: Technical Report
Full Text:: ENHANCED DIAMETER-GROWTH- RATE EQUATIONS FOR UNDAMAGED AND DAMAGED TREES IN SOUTH- WEST OREGON by

Predicting height to crown base for undamaged and damaged trees in southwest Oregon

Creator:: Hanus, Mark L., Hann, David W., Marshall, David D., and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting height to crown base are presented for tree species from southwest Oregon. Equations for undamaged and damaged trees were estimated with weighted nonlinear regression techniques. The effects of specific damaging agents on the height to crown base were explored, and damage correction factors were estimated. The damage...
Resource Type:: Technical Report
Full Text:: ORGANON (ORegon Growth ANalysis and projectiON), a model for predicting the growth of individual trees in

Asymptotic height-diameter equations for twenty-four tree species in western Oregon

Creator:: Garman, Steven L. (Steven Lee), 1955-, Acker, Steven A., Ohmann, Janet L., Spies, Thomas A. (Thomas Allen), and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting height from diameter outside bark at breast height (DBH) were generated for 24 tree species in western Oregon. The equations were based on the asymptotic Chapman-Richards function. Because geographic location and site productivity may influence height-diameter relationships, height-diameter measures from 8727 plots were first grouped by site...
Resource Type:: Technical Report
Full Text:: , and D.R. LARSEN. 1989. ORGANON: southwest Oregon growth and yield model user manual. Version 2.0

Equations for estimating biomass and leaf area of plants in the Pacific Northwest

Creator:: Oregon State University. Forest Research Laboratory, Gholz, Henry L., Grier, C. C., Campbell, A. G., and Brown, A. T.
Abstract:: Reliable estimates of plant biomass and leaf surface area are essential for studying primary production, nutrient cycling, hydrology, wildlife management, and fire. This paper presents equations that can be used to make such estimates for most plant species-trees, shrubs, and herbs-dominant in western and central Oregon.' We also document the...
Resource Type:: Technical Report
Full Text:: . LOGAN. 1977. Old-growth Pseu- dotsuga menziesii communities of a western Oregon watershed: bio- mass

Analysis methods for modeling tree and stand growth responses to fertilization and thinning

Creator:: Wang, Chao-huan
Abstract:: This paper describes methods that can be used to evaluate stand and tree growth response to a single application of fertilization and/or thinning with data collected from multiple installations. Two kinds of methods were proposed: (1) structure analysis which applies covariance analysis in a blocked design with and without sampling...
Resource Type:: Dissertation

Mortality equations for individual trees in the mixed-conifer zone of southwest Oregon

Creator:: Hann, David W., Wang, Chao-huan, and Oregon State University. Forest Research Laboratory
Abstract:: Models of stand growth and yield must include an estimate of mortality. For individual-tree/distance-independent growth-and-yield models. it is necessary (1) to predict the probability of death of individual trees and (2) to keep stand projections within reasonable biological limits (e.g., the maximum basal area that the stand can achieve). In...
Resource Type:: Technical Report
Full Text:: / distance-independent model of growth and yield. tically selected sample of trees. An expansion factor

A potato growth and production model

Creator:: Apple, Jeanne Debons
Abstract:: A potato plant growth and production model is developed with the objectives of analyzing management alternatives and exploring the nature of the early dying syndrome. The geographic area of focus was the centerpivot irrigated circles of Oregon's Columbia Basin. A problem analysis of the potato production system of this area,...
Resource Type:: Dissertation
Full Text:: Potato Growth and Production Model by Jeanne Debons Apple A THESIS submitted to Oregon State

Disaggregative and individual-tree growth models in theory and application

Creator:: Ritchie, Martin W.
Abstract:: Disaggregative and individual-tree/distance-independent modeling methods are compared and contrasted. Differences between the two are related to differences in functional and apparent resolution and may be illustrated using aggregation theory. When considering models of different levels of resolution describing a given phenomenon, invariance with respect to the aggregation implied (symmetry) may...
Resource Type:: Dissertation

Comparison of regression and geostatistical methods to develop LAI surfaces for NPP modeling

Creator:: Berterretche, Mercedes
Abstract:: This study aims to compare different methods of obtaining maximum growing season leaf area index (LAI) maps using remote sensing data, LAI and tree cover field data in a boreal forest near Thompson, Manitoba, Canada. The comparison includes aspatial methods such as traditional regression, inverse regression and reduced major axis,...
Resource Type:: Masters Thesis

Nonlinear models of height growth for Douglas-fir in southwestern Oregon

Creator:: Scrivani, John A.
Abstract:: A review is made of methods which assess the bias and non-normality of parameter estimates and predictions obtained with nonlinear regression. Particular emphasis is placed upon curvature measures of nonlinearity, related measures of parameter and prediction bias, and the effects of reparameterizations. Alternate models of individual tree height growth are...
Resource Type:: Dissertation

ScholarsArchive@OSU

Enhanced diameter-growth-rate equations for undamaged and damaged trees in southwest Oregon

Predicting height to crown base for undamaged and damaged trees in southwest Oregon

Asymptotic height-diameter equations for twenty-four tree species in western Oregon

Equations for estimating biomass and leaf area of plants in the Pacific Northwest

Analysis methods for modeling tree and stand growth responses to fertilization and thinning

Mortality equations for individual trees in the mixed-conifer zone of southwest Oregon

A potato growth and production model

Disaggregative and individual-tree growth models in theory and application

Comparison of regression and geostatistical methods to develop LAI surfaces for NPP modeling

Nonlinear models of height growth for Douglas-fir in southwestern Oregon

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