ISSN: 0041-3216

ISSN: 0041-3216 (Online), 0041-3216 (Print)
Volume 49 Number 4
Research Papers
Ammonium fixation and its effect on mineralogical properties of West Indian soil clays
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The NH4-fixing properties of twelve West Indian soil clays representing six diverse soil types from Trinidad and Barbados were studied. The data indicate that the clays have high native NH4 contents-due most likely to prolonged use of nitrogenous fertilizers and some mineralization. All clays fixed NH4 in amounts ranging from 1·06 to 9·54 mequiv./1OOg. NH4 fixation was associated with reductions in surface area and mineralogical changes were evident in one of the samples.