Precipitation as a basis for estimating crop yields in central South Dakota,
by Ray R. Pengra ...

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Main Author: Pengra, Ray F.
Language(s): English
Published: [Brookings, S. D.] 1946.
Subjects: Correlation (Statistics)
Agriculture > Agriculture / South Dakota.
Crops and climate
Note: Mimeographed.
Thesis (B.S.) - South Dakota state college of agriculture and mechanic arts.
Physical Description: 5 p. l., 52 numb. l. incl. illus. (maps) tables, diagr. 28 cm.
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