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Relative Availability to Corn of Nutrient Elements as Affected by Minor Element Sources Applied to Everglades Peat and Norfolk Loamy Fine Sand¹

Sypnosis: The relative availability of Ca, Mg, K, P, Mn, Fe, Cu, Zn, Mo and B to corn was compared between two soils by ratios of the corn ear leaf composition and by ratios found for the extractable soil nutrients. The effect of added minor element sources on the ear leaf composition was studied in the field. Nutrient changes were statistically evaluated. Significant B — Ca, B — Mg, B — Mo and Zn — Mn relationships were found with the intensity dependent on the source. Minor element nutrients in the leaves were increased by adding soluble and moderately soluble sources when the available supply in the soil was low.

² Associate Biochemist, Soils Chemist, Assistant Chemist and Interim Research Fellow, respectively, University of Florida Agr. Exp. Sta. The authors wish to acknowledge the assistance of S. A. Duchaine, T. E. Cleveland and R. W. Lewis in the analytical routine of these analyses and the help of H. L. Carver, R. W. Lipscomb, C. E. Hutton and W. K. Robertson in certain phases of this work.

Received for publication December 14, 1956.