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Rapid changes in nitrite after gamma irradiation of fresh soils

Published online by Cambridge University Press:  27 March 2009

P. A. Cawse  and
T. White
P. A. Cawse
Affiliation:
Wantage Research Laboratory (A.E.R.E.), Wantage, Berks
T. White
Affiliation:
Wantage Research Laboratory (A.E.R.E.), Wantage, Berks
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Summary

Increases in nitrite in ten gamma-irradiated soils have been investigated under aerobic conditions up to 7 days after treatment over the range 0·25–2·5 Mrad. The formation of nitrite showed significant correlations with the percentage of soil inorganic carbon and incubation time, and over 100 ppm nitrite-N accumulated within 3 days in Broadmoor series, which contained the most inorganic carbon. Only the very acid series failed to produce nitrite, but formation and persistence was poor in all soils below pH 7.

Leaching with ammonium or nitrate ions after irradiation suggested that microbial reduction of nitrate was the mechanism responsible for nitrite accumulation, rather than inhibition of nitrite oxidation.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 73 , Issue 1 , August 1969 , pp. 113 - 118
Copyright
Copyright © Cambridge University Press 1969

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