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Soil : the yearbook of agriculture, 1957. - Washington : USDA , 1957 - xiii, 784p. : ill., fig. maps ; 23 cm. - Yearbook of Agriculture V. 1957 .

Includes bibliographical references and index.


Soils
Soil fertility
Agriculture--United States
Land use

630 / US 2
Last Updated on April 2, 2019
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