Сводный каталог книг

[Текст] : доклад, тезисы доклада / A.B. Berry. - Ottawa : Department of Forestry, 1963. - 10 с. : рис. - (Forest Research Branch Contribution ; 539). - eng. - Библиогр.: с. 9-10. - 0.10 р.

УДК

634.9m

Аннотация: A brief history is given for a 47-acre woodlot successively high-graded for the best timber, grazed by cattle, cut haphazardly for fuelwood then placed under management with the object of developing a balanced stand structure for the maximum production of wood volume under the selection system. Four stem-distributions are being tested, two levels of growing stock and two upper diameter limits, combined with two cutting cycles. From the analysis of the results the best, or ideal, stand structure will be determined for this area

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[Текст] / A.B. Berry. - Ottawa : Forest Research Branch, 1964. - 2 с. : 1 table. - (Forestry Chronicle / Forestry Research Branch ; 1). - Библиогр: В надзаг.:. - 0-05 р.

УДК

634.9

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[Текст] / A.B. Berry ; Forest Research Branch, Canada. - Ottawa : Forest Researcg Branch, 1964. - 6 с. : tables. - (Forest Research Branch Contribution / Forest Researcg Branch, Canada ; 568). - Библиогр: p. 6. - 0-05 р.

УДК

634.9

Аннотация: The paper deals with the study in pruning plantation white spruce and red pine. Pruning whire spruce to a height of 17 feet took about twice as long as pruning red pine to the same height, owing to differences in the branching habit, length og live crown and the persistence of the brances of the species.

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