Pamphlets on Conservation of Natural Resources, Volumen18U.S. Government Printing Office, 1909 |
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Página 232
... reasons . The first is that the world's human population is increasing at an almost explosive rate . The second reason lies in the changing cultural patterns of very large numbers of the human family . Modern means of communication have ...
... reasons . The first is that the world's human population is increasing at an almost explosive rate . The second reason lies in the changing cultural patterns of very large numbers of the human family . Modern means of communication have ...
Página 234
... reason why the major emphasis in this discussion centers upon renewable resources . Unlike metals and minerals , the productivity of each of these resources is dependent on each of the others . Soils cannot produce crops without water ...
... reason why the major emphasis in this discussion centers upon renewable resources . Unlike metals and minerals , the productivity of each of these resources is dependent on each of the others . Soils cannot produce crops without water ...
Página 241
... reason for high soil loss and runoff on the potato field was that the ground was frozen while the grass and forest cover had protected the soil from freezing thus allowing the water to infiltrate . Destructive lumbering and overgrazing ...
... reason for high soil loss and runoff on the potato field was that the ground was frozen while the grass and forest cover had protected the soil from freezing thus allowing the water to infiltrate . Destructive lumbering and overgrazing ...
Página 259
... reason for accelerated cutting . These considerations are often exaggerated . Long - term forest management has proved highly profitable for many small owners and can be profitable for many more who are yet unaware of its practicality ...
... reason for accelerated cutting . These considerations are often exaggerated . Long - term forest management has proved highly profitable for many small owners and can be profitable for many more who are yet unaware of its practicality ...
Página 270
... reason is that they are cruel or seem to be cruel . Of course man is the greatest killer of all and often the cruelest , but that does not prevent him from passing judgment upon the " goodness " and " badness " of other animals . There ...
... reason is that they are cruel or seem to be cruel . Of course man is the greatest killer of all and often the cruelest , but that does not prevent him from passing judgment upon the " goodness " and " badness " of other animals . There ...
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Términos y frases comunes
acres agencies Agriculture annual areas bill boys Bureau CAGNEY camp Chairman Civilian Conservation Corps Commission committee Congress conservation movement Construction cooperation coordination cost Council delinquency Department Douglas-fir economic enrollees existing facilities Federal Government fire Forest Fire forest land FOREST PROTECTION Forest Service forestry Gifford Pinchot Governor habitat important improvements increase industry Insect and Disease interest Interior January 26 juvenile Kalamazoo River labor legislation Maintenance Management and administration ment miles million acres mineral national forests national-forest natural resources organization parks percent plans planting population present President problems production proposed recommendations recreation Reforestation regional resource development Resource Management Resources and Conservation responsibility river roads and trails Senator CLARK Senator Humphrey SENATOR MURRAY Senator RANDOLPH Silviculture statement streams surveys Theodore Roosevelt Timber purchasers tion U.S. Senate United utilization Washington watershed welfare wildlife young Youth Conservation Corps