Forms of sulphur and available sulphur extracted by some extractants in some inceptisols [in India]
1993
Saha, S.C. | Singh, B.
Twenty-two surface soil samples from alluvial Inceptisols of Varanasi district of India were analysed for sulphur forms, and available sulphur by nine soil test methods to determine the suitability of the chemical extractants for these soils. The relative suitability of these extractants was in descending order: 0.15% CaCl(2)CaH2PO4(2) (500 ppm P) + 2NHOAc heat treatment 1% NaCl 0.1M LiCl 0.5M NaHCO(3) (pH 8.5) 0.5N NH(4)OAc + 0.25N HOAc (pH 5.0) N NaOAc + HOAc (pH 4.8) water. Sulphate sulphur had high degree of correlation with all the extractants. Total, and organic sulphur showed significant correlation with the relative yield of groundnut shoot. All the chemical extractants showed correlation with relative yield, and uptake of sulphur by plants. In view of high degree of correlation of soil test values by 0.15% CaCl(2) with all the plant response parameters, this procedure has been considered to be the best amongst the procedures compared. The critical limits of extractable sulphur were 12.0 ppm for 0.15% CaCl(2), 16 ppm for CaH2PO4(2) (500 ppm P) + 2N HOAc, 24.0 ppm for heat treatment, and 11.0 ppm for 1% NaCl.
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Este registro bibliográfico ha sido proporcionado por Bangladesh Agricultural Research Council