Soil.

Soil. - Washington, U.S. Govt. Print. Off. [1957] - xiii, 784 p. illus., maps. 24 cm. - Its Yearbook of agriculture, 1957 . - Yearbook of agriculture (Washington, D.C. : 1926) ; 1957. .

Limited to the management of soil.

agr57000244


Soils.
Soil conservation--United States.
Soils--United States.

S21 / .A35 1957

1Ag 84y 1957

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