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Published in Soil Sci Soc Am J 30:119-124 (1966)
© 1966 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Response of Corn to Zinc as Affected by Nitrogen and Phosphorus Fertilizers1

G. L. Terman, S. E. Allen and B. N. Bradford2

ABSTRACT

Response of 2 successive crops of corn (Zea mays L.) forage to fine zinc sulfate mixed with 2 soils was measured in greenhouse pot experiments. Zinc sulfate was also incorporated into –9 + 16-mesh granules of each of four phosphates, ammonium nitrate (AN), and ammonium sulfate (AS) fertilizers. Large amounts of fine dicalcium phosphate (DCP), concentrated superphosphate (CSP), monoammonium phosphate (MAP), and ammonium polyphosphate (APP) depressed the pH of Hartsells fine sandy loam (limed to pH 7.1) increasingly in the order listed. Depression in soil pH was closely related to response of corn to 6 and 12 mg of applied Zn per pot (2 and 4 ppm of Zn). In Nolichucky sandy clay loam (pH 7.3) and Hartsells soil limed heavily to pH 8.0, soil pH remained high and response to Zn with the APP, MAP, and CSP sources of P was similar and greater than with DCP. Forage yields and uptake of Zn were in the order: Zn mixed alone with the soil > Zn in AN or AS granules > Zn in phosphate granules > no applied Zn. Results with Zn in DCP granules were poorest. Reciprocal Relationships between concentrations of P and Zn in the corn were largely related to yield levels dependent on sufficiency of Zn.

NOTES

1 Contribution from the Soils and Fertilizer Research Branch, Division of Agricultural Development, TVA, Wilson Dam, Ala. Part of the paper was presented before Div. S-4, Soil Science Society of America, Nov. 16, 1964, at Kansas City, Mo.

2 Agronomist, Plant Physiologist, and Analytical Chemist, respectively.

Received for publication June 14, 1965. Accepted for publication September 2, 1965.






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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1966 by the Soil Science Society of America.