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Transformation of urea and ammonium sulphate in different soils

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Summary

The transformation of urea and ammonium sulphate in Ladwa sandy loam and Balsamand sand was studied in laboratory. Urea took at least one week in sandy loam and 2 weeks in sandy soils to hydrolyse completely. The process of hydrolysis was faster in finer soil with high organic matter than in coarse soil having low organic matter. There was no nitrification upto 3 days in sandy loam and upto 7 days in sandy soils, respectively, but there was immobilization of NO3-N during these initial periods. The NO3-N content at the end of incubation period (35 days) was more in case of urea than in case of ammonium sulphate treated samples in sandy loam soil and reverse was true in sandy soil. The hydrolysis of urea did not follow zero or first order kinetics as proposed in previous studies.

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Authors and Affiliations

  1. Department of Soils, Haryana Agricultural University, 125004, Hissar, Haryana, India

    Mahendra Singh & D. S. Yadav

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  1. Mahendra Singh
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  2. D. S. Yadav
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Singh, M., Yadav, D.S. Transformation of urea and ammonium sulphate in different soils. Plant Soil 63, 511–515 (1981). https://doi.org/10.1007/BF02370053

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  • DOI: https://doi.org/10.1007/BF02370053

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