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Substitution of reduced iron by zinc in total soil nitrogen estimation by modified Olsen's method
Published online by Cambridge University Press: 27 March 2009
Extract
The conventional Kjeldahl method which is usually employed for determination of total N in soil does not effect quantitative recovery of NO2- or NO3- (Bremner, 1965). Therefore, various modifications have been suggested (Cope, 1916; Davisson & Parson, 1919). Bremner (1965) observed that the quantitative recovery of NO2- and NO3- by any method, other than the modified Olsen's method (Bremner & Shaw, 1958), is not certain.
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References
Bremner, J. M. (1965). Total nitrogen. In Methods of Soil Analysis Pt 2 (ed. Black, C. A. et al. ), pp. 1149–1178. Madison, Wisconsin: American Society of Agronomy.Google Scholar
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