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Urea hydrolysis in semi-arid tropical alfisols and vertisols

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Relation http://oar.icrisat.org/660/
 
Title Urea hydrolysis in semi-arid tropical alfisols and vertisols
 
Creator Jayakumar, G W L
 
Subject Soil Science
 
Description The microplot method of experimentation was found to be
more suitable for measuring urea hydrolysis rates in the
field than the sampling of larger (4 m2) plots. The
accumulation of N H -~N, NO; -N and NO; -N in soils and the
disappearance of urea could be measured with better
precision, and the recoveries of nitrogen were better.
The comparison between the data from the microplot
experiments and laboratory incubation studies indicated that
urea hydrolysis rates in the field could be predicted from
the laboratory studies. This finding has to be examined
further with detailed experimentation. Further experiments
are also required to relate urease activity with soil
variables such as organic carbon and clay content, so that
more general relationships can be generated in the present
study to prepare models for predicting urea hydrolysis in
agricultural soils.
 
Date 1991
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/660/1/60620.pdf
Jayakumar, G W L (1991) Urea hydrolysis in semi-arid tropical alfisols and vertisols. PhD thesis, Andhra Pradesh Agricultural University.