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THE IDEA AND THE BOOK
NATURAL ENVIRONMENT AND RESOURCES
WATER ON THE LAND
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acres Agriculture American Forests animals areas become better birds burning cent Chapter coal commercial conifers crop cultural dams destructive drainage drainage basins drought economic environment erosion farm farmer federal Felix Summers fertility Figure fire fish fishery flood forestry future geographic grass grasslands grazing ground water gullies habitat humus improvement increase industry iron irrigation lakes land land economy landscape less live logging material ment metals million mineral moisture National Parks natural resources operations organic parent material pasture pine planning plant plow pollution population practical problem production protection rain range range lands recreational regions renewable resources reservoirs rodents run-off S.C.S. photo season servation Service slash pine slope soil conservation space species storage streams supply surface teacher tillage timber tion trees U.S. Forest Service United unless vegetation Washington waste water conservation water table watersheds wealth wilderness wildlife wind wood