Symposium on Forestry and the Public Welfare: Papers Read Before the American Philosophical Society, Autumn General Meeting November 17, 1944American philosophical society, 1945 - 90 pages |
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Page 414
... present state of topsy - turvy adjustments of mankind to the earth's resources . On the other hand , it is well to indulge in such speculation if we seek a long - range answer to this question of world - wide needs of wood ...
... present state of topsy - turvy adjustments of mankind to the earth's resources . On the other hand , it is well to indulge in such speculation if we seek a long - range answer to this question of world - wide needs of wood ...
Page 416
... present treatment of forests , an average annual growth of 25 cubic feet per acre is estimated for the principal commercial forest areas . Improved management would double this figure . Here no distinction is made between temperate ...
... present treatment of forests , an average annual growth of 25 cubic feet per acre is estimated for the principal commercial forest areas . Improved management would double this figure . Here no distinction is made between temperate ...
Page 480
... present knowledge of the value . of their wood and timber . It is said to be not more than twenty - five years , since the southern live oak or ever - green oak has been used in ship- building . The importance of pot - ash is by no ...
... present knowledge of the value . of their wood and timber . It is said to be not more than twenty - five years , since the southern live oak or ever - green oak has been used in ship- building . The importance of pot - ash is by no ...
Contents
Forests in Relation to Soil and Water | 399 |
Worldwide Needs of Woods as a Land Conservation Crop | 408 |
Americas Role in Meeting World Timber Needs | 418 |
3 other sections not shown
Common terms and phrases
agricultural American forest American Philosophical Society André François André Michaux ashes billion burning cedar cent century clearing climate cooperation corn crop cubic feet cultivation deforestation destruction developed district economic especially Europe European farm felled fence fire forest conservation forest industries forest land forest owners forest products Forest Service Forests and Parks fuel Government ground growing growth Humphrey Marshall hundred important improvement cutting increase JEREMY BELKNAP John Bartram John Evelyn Kennebeck labor Lebanon less logs lumber lumber industry manufacture mast measures ment Michaux mountains nature needs November 17 operation ownership paper pasture Pennsylvania Philadelphia pine plants pot ashes present problem protection public ownership pulp pulpwood raw materials region Regulation settlements settlers ship slopes soil stands stumps supply surface runoff timber timber products timberland tion tracts Travels trees United wind wood products wood pulp woodland woodlot