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Published online 9 January 2007
Published in J Environ Qual 36:155-162 (2007)
DOI: 10.2134/jeq2006.0082
© 2007 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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Ground Cover Impacts on Nitrogen Export from Manured Riparian Pasture

David M. Butlera,*, Noah N. Ranellsa, Dorcas H. Franklinb, Matthew H. Poorec and James T. Green, Jr.a

a Dep. of Crop Science, North Carolina State Univ., Box 7620, Raleigh, NC 27695
b USDA-ARS, J. Phil Campbell Sr. Natural Resource Conservation Center, 1420 Experiment Station Rd., Watkinsville, GA, 30677
c Dep. of Animal Science, North Carolina State Univ., Box 7621, Raleigh, NC, 27695


Figure 1
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  		Fig.1. Mean cumulative nitrate nitrogen (NO3–N) export during 30 min of runoff, as affected by cover (means within each rain event with the same lowercase letter are not significantly different, P > 0.05; uppercase letters indicate significant differences among the combined means of all rain events; diagonal sections indicate application of cattle feces and urine).

 

Figure 2
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  		Fig. 2. Mean cumulative nitrate nitrogen (NO3–N) export during 30 min of runoff, as affected by rain event (bars with the same letter are not significantly different in the combined mean of all rain events, P > 0.05).

 

Figure 3
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  		Fig. 3. Mean cumulative total nitrogen (TN) export during 30 min of runoff, as affected by cover (bars with the same letter are not significantly different in the combined mean of all rain events, P > 0.05; means within each rain event had the same relationships as the combined mean except in June; diagonal sections indicate application of cattle feces and urine).

 




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Journal of Natural Resources
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Copyright © 2007 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.