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1976•Journal of the Indian Society of Soil ScienceOpen access

Studies on Distribution of Sulphur in Humus Fractions of Some Soils of Rajasthan

L. L. Somani, S. N. Saxena

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Abstract

Regular decreases in the total, inorganic and organic S contents in soils and S present in various humus fractions with depth are recorded in some soils of Rajasthan. 56.3 to 75.8% of total org. S is associated with humus fractions, mostly in humic acids (HA) followed by fulvic acids (FA), humins, β-humus and least in hymatomelanic acid. The HA-S/FA-S varies from 0.37 to 7.37, decreasing with increasing depth. Similarities of constitutional composition were observed between sulphur present in certain humus fractions.

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Regular decreases in the total, inorganic and organic S contents in soils and S present in various humus fractions with depth are recorded in some soils of Rajasthan. 56.3 to 75.8% of total org. S is associated with humus fractions, mostly in humic acids (HA) followed by fulvic acids (FA), humins, β-humus and least in hymatomelanic acid. The HA-S/FA-S varies from 0.37 to 7.37, decreasing with increasing depth. Similarities of constitutional composition were observed between sulphur present in certain humus fractions.

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Available abstract

Regular decreases in the total, inorganic and organic S contents in soils and S present in various humus fractions with depth are recorded in some soils of Rajasthan. 56.3 to 75.8% of total org. S is associated with humus fractions, mostly in humic acids (HA) followed by fulvic acids (FA), humins, β-humus and least in hymatomelanic acid. The HA-S/FA-S varies from 0.37 to 7.37, decreasing with increasing depth. Similarities of constitutional composition were observed between sulphur present in certain humus fractions.

Key concepts: Humus, Humin, Soil water, Humic acid, Sulfur, Chemistry, Environmental chemistry, Composition (language)

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