Diagnostic techniques for soils and crops : their value and use in estimating the fertility status of soils and nutritional requirements of crops - Bear, Firman E. (Firman Edward), 1884-1967.; Kitchen, Herminie B. (Herminie Broedel), 1901-1973 (Washington : American Potash Institute, 1948)
Includes bibliographical references and index.
Keywords: Soils -- Analysis; Soil fertility; Soils -- Testing; Soil fertilizer requirements; Plants -- Nutrition; Deficiency diseases in plants; Agricultural chemistry