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Effects of Herbicides in a Crop‐Herbicide Rotation on Sulfur Oxidation in Tifton Soil 1
Author(s) -
Jones L. S.,
Anderson O. E.,
Dowler Clyde
Publication year - 1974
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/agronj1974.00021962006600060010x
Subject(s) - tifton , agronomy , soil water , crop rotation , chemistry , sulfur , incubation , sulfate , crop , pesticide , environmental science , dry matter , biology , soil science , biochemistry , organic chemistry
Crop production on light‐textured soils is often dependent on the microbial oxidation of sulfur from soil organic matter or S‐amended fertilizers. Because of the recognized influence of some herbicides on microbial activity, we investigated possible effects of herbicides on the oxidation of S. To study the possible relationship between S availability and herbicides, a field of Tifton Is was selected where herbicides had been applied for 3 years to soil on which corn, soybeans, cotton, and peanuts were grown continuously and in rotation. Recommended rates and methods of application were used in applying the chemicals. During the third year, soil samples were collected from the 0 to 15 cm layer of all plots. Samples were amended with elemental S, incubated at 32C, and sulfates were determined at 10‐day intervals. Oxidation of added S proceeded in all samples, and though the accumulation of sulfates was slowed during the first 10 days, never was it completely inhibited. Irrespective of treatment, the added S was completely oxidized to sulfate by the 40th day of incubation. Though the effect was minor, the combinations of herbicides applied to soybeans and peanuts tended to affect sulfofication more than those applied to corn and cotton.