Pamphlets on Conservation of Natural Resources, Volumen18U.S. Government Printing Office, 1909 |
Dentro del libro
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Página 235
... important resource of all , and it is ultimately the origin and source of all other energy . It provides light and heat ; it evaporates and draws up into the sky the water vapor which later falls as rain ; it enables plants to form ...
... important resource of all , and it is ultimately the origin and source of all other energy . It provides light and heat ; it evaporates and draws up into the sky the water vapor which later falls as rain ; it enables plants to form ...
Página 236
... important then that more and more people learn the probable effects of resource use in each situation : some practices are inherently harmful , some thoroughly beneficial , most are mixed , with good and bad effects on the environment ...
... important then that more and more people learn the probable effects of resource use in each situation : some practices are inherently harmful , some thoroughly beneficial , most are mixed , with good and bad effects on the environment ...
Página 260
... important concepts in the management of our national forests is that known as " multiple use " . Among the most important of uses ( though there are many others ) are water supply , timber produc- tion , grazing , recreation and ...
... important concepts in the management of our national forests is that known as " multiple use " . Among the most important of uses ( though there are many others ) are water supply , timber produc- tion , grazing , recreation and ...
Página 265
... Important factors in these changes are food supply , predation and cover . Today the greatest influ- ence in lessening the favorable environment for most of our wildlife is the mechanized activity of man . It is important to recognize ...
... Important factors in these changes are food supply , predation and cover . Today the greatest influ- ence in lessening the favorable environment for most of our wildlife is the mechanized activity of man . It is important to recognize ...
Página 266
... importance to the timber industry and is also vital to wildlife protection . Wildlife management has become a ... important trade and largely accounted for the spectacular and shameful slaughter of the great Amer- ican bison herds ...
... importance to the timber industry and is also vital to wildlife protection . Wildlife management has become a ... important trade and largely accounted for the spectacular and shameful slaughter of the great Amer- ican bison herds ...
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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