A graphic method of interpreting response to fertilizer - Ibach, D. B. (Donald Bryan), 1900- (Washington, D.C. : U.S. Dept. of Agriculture, Agricultural Research Service, 1956)
"Supersedes U.S. Bur. Agr. Econ., FM 105, Determining profitable use of fertilizers, 1953 / by D. B. Ibach and S. W. Mendum."
Includes bibliographical references.
Keywords: Fertilizers -- Graphic methods