[prepared by Bureau of Plant Industry, Soils and Agricultural Engineering, Bureau of Human Nutrition and Home Economics and Extension Service, U.S. Department of Agriculture]
[prepared by Bureau of Plant Industry, Soils, and Agricultural Engineering, Bureau of Human Nutrition and Home Economics and Extension Service, U.S. Dept. of Agriculture]
Date
1947
Series
Miscellaneous publication (United States. Department of Agriculture) ; no. 622