Summary
The rate of conversion of urea to ammonium was studied in some acid tea soils of Sri Lanka. The stable levels of urease present in these soils are adequate to hydrolyse the applied urea. There was rapid and almost complete conversion of urea to ammonium and the rate of hydrolysis was independent of soil moisture at 25 per cent and above. The rate of conversion of urea to ammonium depended on the soil polyphenol concentration and had no relationship with either the organic carbon content or the texture.
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References
Bhavanandan, V. P. and Fernando, V. 1970 Tea Quart.41, 94–106.
Bremner, J. M. and Douglas, L. A. 1971 Soil Biol. Biochem.3, 297–307.
Coulson, C. B.et al. 1960. Soil Sci.11, 20–29.
Douglas, L. A. and Bremner, J. M. 1970 Soil Sci. Soc. Am. Proc.34, 859–862.
Fernando, V. and Roberts, G. R. 1975 Plant and Soil42, 287–291.
Fernando, V. and Roberts, G. R. 1976 Plant and Soil44, 81–86.
Hoffman, E. 1963 Urease.In Methods of Enzymatic Analysis. Ed. H. U. Bergmeyer. Academic Press, New York pp 913–916.
Kularatne, T. and Bhavanandan, V. P. 1971 Tea Quart.42, 101–108.
Pancholy, S. K. and Rice, E. L. 1973 Soil Sci. Soc. Am. Proc.37, 47–50.
Swain, T. and Hills, W. E. 1959 J. Sci. Food Agric.10, 63–68.
Tetlow, J. A. and Wilson, A. L. 1964 Analyst89, 453–465.
Zantua, M. I. and Bremner, J. M. 1975 Soil Biol. Biochem.7, 291–295.
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Wickremasinghe, K.N., Sivasubramaniam, S. & Nalliah, P. Urea hydrolysis in some tea soils. Plant Soil 62, 473–477 (1981). https://doi.org/10.1007/BF02374145
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DOI: https://doi.org/10.1007/BF02374145