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The chemical principles of the rotation of crops : pronounced before the American Agricultural Association, March 4th, 1846

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By: Gardner, Daniel Pereira,

Publication info: [Place of publication not identified], [Publisher not identified], [1846]

Holding Institution: Smithsonian Libraries and Archives

Subjects: Agricultural ecology Biochemistry
Vegetation affected by agriculture in Central America

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By: Cook, O. F. (Orator Fuller), - United States. Bureau of Plant Industry.

Publication info: Washington, U.S. Dept. of Agriculture, 1909

Holding Institution: U.S. Department of Agriculture, National Agricultural Library

Subjects: Agricultural ecology Central America Plant ecology