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Iron and Zinc Response of Chlorotic Rice Grown on Calcareous Soils 1
Author(s) -
Westfall D. G.,
Anderson W. B.,
Hodges R.J.
Publication year - 1971
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/agronj1971.00021962006300050013x
Subject(s) - chlorosis , seedling , oryza sativa , soil water , agronomy , calcareous soils , calcareous , zinc , chemistry , horticulture , botany , biology , environmental science , soil science , biochemistry , organic chemistry , gene
Iron and Zn source and rate experiments were carried out in the field on soils where rice ( Oryza sativa L.) grain yields had been reduced drastically in previous years by seedling chlorosis. Soils where seedling chlorosis occurred were higher in pH, HCO 3 and Ca content and lower in Fe and Zn than adjacent soils where normal growth occurred. Iron sulfate, alone or in combination with ZnSO 4 , was the most effective in correcting seedling chlorosis. A maximum yield increase of over 2,100 kg/ha was obtained with the application of 100 kg/ha of Fe (from Fe 2 (SO 4 ) 3 ). Organic sources of Fe and Zn were less effective in correcting needling chlorosis and producing yield increases.