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Decay of Ponderosa Pine Sawtimber in the Black Hills

Thomas E. Hinds

出版	Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1971
URL	http://books.google.com.hk/books?id=NgeIOLvQtc4C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

A defect study of 1,725 logs cut from 498 trees provided the basis for determining the relationships between tree age, volume, and defect. Red rot was responsible for 8.6 percent, brown rots 7.3 percent, and other defects 3.3 percent of the total 19.2 percent defect. Red rot, found in 68 percent of all trees, was the most important cause of defect.