309 resultados para Soil conservation projects


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United States Department of Agriculture in cooperation with the University of California Agricultural Experiment Station.

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"In cooperation with the University of California Agricultural Experiment Station."

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Cover title.

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"Effective 1952, the Soil Survey was transferred from the former Bureau of Plant Industry, Soils, and Agricultural Engineering to the Soil Conservation Service."

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"Literature cited": p. 91.

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Vols. after Series 1963, no. 1 lack series year and numbering.

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"January 1978."

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"June 1996."

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