950 resultados para Soil conservation projects
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"A compilation of practical tried-and-proved methods which have been developed by state agricultural colleges and extension workers, U.S. soil conservation experts, and county agricultural agents."--p. [2] of cover.
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Bibliography: leaf 27.
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"Literature cited": p. 85.
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Cover title.
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Cover title.
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Shipping list no.: 89-212-P.
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Shipping list no.: 91-283-P.
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Caption title.
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"October 1936."
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"August 1938."
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Cover title.
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Contribution from Soil Conservation Service.
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"Soil Conservation Service and Bureau of Agricultural Economics, U.S. Dept. of Agriculture, in cooperation with the Iowa Agricultural Experiment Station."
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A study of soil erosion on the Honey Hollow creek watershed, Bucks County, Pennsylvania.
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A study of soil erosion on the Honey Hollow creek watershed, Bucks County, Pennsylvania.