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1. Subsoil moisture under semiarid conditions (id:CAT86200632)

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2. Correlations between annual precipitation and the yield of spring wheat in the Great Plains (id:CAT86200631)

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3. Implements and methods of tillage to control soil blowing on the northern Great Plains (id:ORC00000500)

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4. Growing and feeding grain sorghums (id:ORC00000514)

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5. Work of the United States Dry-Land Field Station, Ardmore, S. Dak., 1912 to 1925 (id:CAT88900168)

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6. Growing winter wheat on the Great Plains (id:ORC00000248)