Сводный каталог книг

[Текст] / G.L. Baskerville. - Ottawa : Canadian Department of Forestry Research Branch , 1965. - 7 с. : табл. - (Pulp and Paper Magazine of Canada / Department of Forestry, Research Branch ; june). - eng. - Библиогр.: с. 7. - 0.05 р.

УДК

634.9

Аннотация: Data for natural stands of 700, 1000, 1500, 2000, 3000 and 5000 stem per acre are analyzed to show the influence of changing stand structure on both forest growth and cost harvesting. Inferences are drawn regarding the effect of thinning on stand growth and logging cost. It is noted that silvicultural control can be used only to produce more wood but also to produce a forest which is less costly to harvest.

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[Текст] / G.L. Baskerville ; Canada Department of Forestry. - Ottawa : Queen's Printer and Controller of Stationary, 1961. - 15 с. : figure + tables. - (Forest Research Division Technical Note / Canada Department of Forestry ; 101). - Библиогр: p. 15. - 0-10 р.

УДК

634.9T

Аннотация: A study of the response of 40- to 50-year-old balsam fir to four levels of crown release, 1 to 3,3 to 5,5 to 7 feet, and a control, was carried out at Green River, New Brunswick, between 1953 and 1958. The treatment led to increased basal area growth, but the degree of release had relatively little influence on the rate. The relationship of increment to various intrinsic and extrinsic factors was examined and basal area increment was found to be related to initial breast height diameter, crown width and a derived competition factor, but much variation is unexplained. An equation for predicting basal area growth is presented and a discussion of the possible factors contributing to the unexplained variation is given.

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