Growing stock levels in even-aged ponderosa pine /

Abstract

Growth of the most widely distributed pine in North America is under joint study by the western Forest and Range Experiment Stations of the U. S. Forest Service. Young, even-aged ponderosa pine (Pinus ponderosa Laws.) stands are being examined over a wide range of tree sizes, stand densities, and site index. The single plan that coordinates activities of the four Stations is an example of how the growing stock problem can be handled for a widely distributed species. The wide range in treatments should provide data needed to answer the questions that arise in evaluation and application of multiple use management of ponderosa pine forests. i itensified management of ponderosa pine for wood products depends on control of growing stock. Such control will permit actual yields of the coast form of ponderosa pine to approach its high potential. The interior form of ponderosa pine occurs in areas of lower site quality, and much of it is subject to stagnation. Saw-log rotations of some dense, young stands may be shortened 60 to 80 years by thinning. Growing stock can be controlled most effectively if stand productivity can be forecast for various combinations of such factors as tree size, stand density, and site quality.

Individual tree diameter increment model for managed even-aged stands of ponderosa pine throughout the western United States using a multilevel linear mixed effects model

“…All used a common study plan that divided the range of ponderosa pine in the United States into five provinces and specified five or six stand density levels replicated three times (Myers, 1967). Results from individual installations have been reported previously (Table 1).…”

Silviculture of southwestern ponderosa pine : the status of our knowledge /

“…Since 1962, growing stock levels have been under joint study by the western experiment stations of the USDA Forest Service (Myers 1967 The treatment in the regionwide study is primarily a low thinning; the smallest trees and rough dominants were removed. The wide range of conditions under investigation should provide data needed to answer questions that arise on quantity and quality of timber products, growth prediction, and application of multiple use management of ponderosa pine forests.…”

RMYLD : computation of yield tables for even-aged and two-storied stands /

“…If a growing stock level of 100 is desired, (100/80) x 46.8 or 58.5 square feet per acre will be retained (Hawksworth and Myers 1973). Table 1 can also be used to estimate the Average stand diameter (inches) Figure 2.-Basal area after thinning in relation to average stand diameter for standard levels of growing stock (Myers 1971 (Myers 1967). They are used in RMYLD for all species because such detailed studies have not been conducted for lodgepole pine or spruce-fir stands.…”