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Urea Hydrolysis and Subsequent Loss of Ammonia¹

ABSTRACT

The biochemical hydrolysis of urea is rapid and can be related to soil microbial activities. The reaction rate of the chemical hydrolysis of urea is very slow and insignificant in comparison with the biochemical hydrolysis. Ureanitrogen loss through ammonia volatilization proceeds rapidly and may immediately follow urea hydrolysis. Urea hydrolysis and ammonia volatilization from ammonium carbonate are first order reactions.

¹ Contribution from the Department of Agronomy, Virginia Polytechnic Institute, Blacksburg.

² Graduate Assistant and Associate Professor of Agronomy, respectively. The senior author is now Research Chemist, Niagara Chemical Division, F. M. C. Corporation, Middleport, N. Y.

Received for publication April 12, 1962. Accepted for publication January 8, 1963.