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Response of Corn to Residual and Applied Zinc as ZnSO4 and Zn‐EDTA in Field Investigations 1
Author(s) -
Schnappinger M. G.,
Martens D. C.,
Hawkins G. W.,
Amos D. F.,
McCart G. D.
Publication year - 1972
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1972.00021962006400010021x
Subject(s) - loam , zinc , chemistry , agronomy , yield (engineering) , residual , zea mays , zoology , field experiment , soil water , mathematics , metallurgy , materials science , environmental science , biology , soil science , organic chemistry , algorithm
Field investigations were conducted to evaluate the response of corn ( Zea mays L.) to residual Zn in Litz silt loam and to determine the level of Zn required to correct Zn deficiency in corn on Westmoreland silty clay loam. Corn yields were increased on the Litz soil in 1969, where 7 and 14 kg Zn/ha as broadcast ZnSO 4 , and 4.4 kg Zn/ha as broadcast Zn‐EDTA were applied in 1968. A lower level of broadcast Zn‐EDTA of 2.2 kg Zn/ha was inadequate to increase yield. The residual Zn from application of 14 kg Zn/ha as ZnSO 4 increased yield to a greater extent than residual Zn from application of 4.4 kg Zn/ha as Zn‐EDTA. Residual Zn from application of 7 kg Zn/ha as ZnSO 4 was intermediate between these treatments in increasing yield. More than 13.6 kg Zn/ha as broadcast ZnSO 4 was required to correct Zn deficiency of corn on a Westmoreland silty clay loam.