(Text Page) Method of Soil Analysis Used in the Division of Soil Chemistry and Physics, Bureau of Chemistry and Soils (continued). Atlas of American Agriculture: Atlas of American Agriculture. Physical Basis including Land Relief, Climate, Soils, and Natural Vegetation of the United States. Prepared under the Supervision of O.E. Baker, Bureau of Agricultural Economics. Contributions from the Weather Bureau, Willis R. Gregg, Chief; Bureau of Chemistry and Soils, H.G. Knight, Chief; Bureau of Plant Industry, Frederick D. Richey, Chief; Forest Service, F.A. Silcox, Chief; Bureau of Agricultural Economics, A.G. Black, Chief. United States Department of Agric

Robinson, W.O ; Baker, Oliver Edwin

U.S. Department of Agriculture 1935

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