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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
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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.