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Published online 9 August 2005
Published in J Environ Qual 34:1573-1580 (2005)
DOI: 10.2134/jeq2004.0433
© 2005 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effects of Commercial Diazinon and Imidacloprid on Microbial Urease Activity in Soil and Sod

C. W. Ingram, M. S. Coyne* and D. W. Williams

Department of Plant and Soil Sciences, N-122 Agricultural Science Building, 500 South Limestone Street, University of Kentucky, Lexington, KY 40546-0091



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  		Fig. 1. Effect of imidacloprid on jack bean and Bacillus pasteurii urease activity. Error bars represent one standard deviation of the mean.

 


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  		Fig. 2. Effect of diazinon on jack bean and Bacillus pasteurii urease activity. Error bars represent one standard deviation of the mean.

 


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  		Fig. 3. Effect of imidacloprid on urease activity in the vegetative layer of bluegrass amended with urea (imidacloprid application = g m–2). Error bars represent one standard deviation of the mean.

 


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  		Fig. 4. Effect of imidacloprid on urease activity in the organic layer of bluegrass amended with urea (imidacloprid application = g m–2). Error bars represent one standard deviation of the mean.

 


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  		Fig. 5. Effect of imidacloprid on urease activity in the mineral layer of bluegrass amended with urea (imidacloprid application = g m–2). Error bars represent one standard deviation of the mean.

 


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  		Fig. 6. Effect of diazinon on urease activity in the vegetative layer of bluegrass amended with urea (diazinon application = g m–2). Error bars represent one standard deviation of the mean.

 


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  		Fig. 7. Effect of diazinon on urease activity in the organic layer of bluegrass amended with urea (diazinon application = g m–2). Error bars represent one standard deviation of the mean.

 


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  		Fig. 8. Effect of diazinon on urease activity in the mineral layer of bluegrass amended with urea (diazinon application = g m–2). Error bars represent one standard deviation of the mean.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2005 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.