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Response of Several Corn Hybrids to Level of Water‐Soluble Zine in Fertilizers
Author(s) -
Giordano P. M.,
Mortvedt J. J.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300010038x
Subject(s) - chemistry , forage , agronomy , soil water , fertilizer , ammonium , phosphate , ammonium polyphosphate , solubility , zinc , nutrient , ammonium nitrate , biology , biochemistry , raw material , ecology , organic chemistry
Fertilizers varying in level of H 2 O‐soluble Zn were prepared by combining fine ZnO and ZnSO 4 in various proportions and pressure‐granulating the powders with ammonium nitrate, monoammonium phosphate, or ammonium polyphosphate. Forage yields and uptake of Zn by corn ( Zea mays L.) grown on a P‐ and Zn‐deficient soil in the greenhouse increased with the level of H 2 O‐soluble Zn in these macronutrient fertilizers. Additional crop response was slight to fertilizers with levels of H 2 O‐soluble Zn in excess of about 50% but this varied, depending upon the macronutrient carriers. However, the amounts of Zn extracted after cropping from untreated soils and soils initially receiving 12 mg of Zn per 3 kg of soil in a highly H 2 O‐soluble form were comparable. In a second experiment differential response of several corn hybrids to amount of P and Zn and level of Zn solubility in the fertilizers suggests that the test variety might influence the interpretation of the results from fertilizer evaluation studies. No relationship was found between P/Zn ratios in the corn forage and the seed. The P/Zn ratios in corn forage were not related to the response of corn to applied Zn.