Ponderosa Pine Tree Classes Redefined
Abstract:This article presents a redefinition of the tree classes proposed by the author in 1936 for determining the susceptibility of ponderosa pines to bark beetle attack. It is based on additional study of 3,700 trees and should assist in placing borderline trees in the class most nearly representing their rate of growth and mortality risk.
Document Type: Journal Article
Affiliations: Senior Entomologist, Bureau of Entomology and Plant Quarantine, U.S. Department of Agriculture, Berkeley, Calif.
Publication date: April 1, 1943
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