735 resultados para United States. Soil Conservation Service


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"SCS-TP-106"--cover.

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"In cooperation with the Minnesota Agricultural Experiment Station and the St. Anthony Falls Hydraulic Laboratory."

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"September 1949"

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Explains principles of contour plowing; stresses the need for soil conservation and increased food production as part of the struggle to win World War II.

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"Prepared for the U. S. Department of Agricluture, Soil Conservation Service."

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"Progress report on Illinois watersheds."--Cover.