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An Evaluation of Mogilevkina's Method of Determining Fixed Ammonium in Soils
Author(s) -
Nelson D. W.,
Bremner J. M.
Publication year - 1966
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1966.03615995003000030031x
Subject(s) - kjeldahl method , ammonium , nitrogen , soil water , chemistry , residue (chemistry) , environmental chemistry , soil science , environmental science , organic chemistry
Studies using soils and ammonium‐saturated clay minerals showed that Mogilevkina's method of determining fixed ammonium gave much lower values than HF methods and was unsatisfactory. The heat treatment used in this method for removal of organic‐N and exchangeable ammonium‐N leads to loss of fixed ammonium, and the Kjeldahl procedure used to determine the nitrogen in the residue from this treatment fails to recover this nitrogen quantitatively.