Pamphlets on Conservation of Natural Resources, Volumen6U.S. Government Printing Office, 1913 |
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Página 21
... trees of various kinds and Further investigations should be made of the costs of manufacturing many by - products , and of the conditions under which such operations are suc- cessful . The effect of unrestrained competition in timber ...
... trees of various kinds and Further investigations should be made of the costs of manufacturing many by - products , and of the conditions under which such operations are suc- cessful . The effect of unrestrained competition in timber ...
Página 35
... trees and their qualities , planting and culture of woodlots , prices and transportation of lumber , the fac- tors governing growth , protection and manufacture of lumber , etc. , and con- stantly work in the principles which it is most ...
... trees and their qualities , planting and culture of woodlots , prices and transportation of lumber , the fac- tors governing growth , protection and manufacture of lumber , etc. , and con- stantly work in the principles which it is most ...
Página 43
... trees in the vicinity of the school on waste land , they will go out and watch those trees grow and in that way we think we have made quite a step towards the solution of the various problems . We are also getting out some little cards ...
... trees in the vicinity of the school on waste land , they will go out and watch those trees grow and in that way we think we have made quite a step towards the solution of the various problems . We are also getting out some little cards ...
Página 46
... trees ; in hardwoods it may kill or seriously injure them . Organized work in fire fighting and more effective prevention of fires in many of the forested States has minimized losses from this cause . Thus , in the record of Connecticut ...
... trees ; in hardwoods it may kill or seriously injure them . Organized work in fire fighting and more effective prevention of fires in many of the forested States has minimized losses from this cause . Thus , in the record of Connecticut ...
Página 48
... trees has been brought within reasonable limits by development of State nurseries and by the establishment of private nursery companies . Cost of setting trees varies greatly , depending upon local conditions of site and availability ...
... trees has been brought within reasonable limits by development of State nurseries and by the establishment of private nursery companies . Cost of setting trees varies greatly , depending upon local conditions of site and availability ...
Términos y frases comunes
acres administration agricultural American Forestry Association amount annual average camp cent Chairman commercial companies conifers Conservation Congress consumer cooperation cost course Douglas fir effect eucalyptus favor Federal Government feet field fire protection fire wardens forest fires forest land forest law forest products forest protection forest schools Forest Service forest taxation Forestry Committee future grades growth hardwood important increase interest investment legislation logging lumber lumber industry lumbermen manufacturing meeting methods mill moisture mountains national forests operations Oregon organization patrol patrolmen planting possible practical precipitation present private forestry private owners problem profit property tax railroad ranger school reason reforestation region revenue sections secure silvicultural soil spark arresters species stumpage sub-committee supply timber land timber owners tion town trees utilization waste white pine woods yellow pine yield tax