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Published online 6 July 2006
Published in J Environ Qual 35:1576-1583 (2006)
DOI: 10.2134/jeq2005.0225
© 2006 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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Use of Physical Properties to Predict the Effects of Tillage Practices on Organic Matter Dynamics in Three Illinois Soils

Gayoung Yooa,*, Todd M. Nissenb and Michelle M. Wanderc

a Korea Environment Institute, 613-2 Bulgwang-Dong, Eunpyeong-Gu, Seoul, 122-706 Korea
b Office of Multilateral Trade Affairs, Room 3828 HST, Department of State, Washington, DC 20520
c Department of Natural Resources and Environmental Sciences, University of Illinois, S406 Turner Hall MC 047, 1102 South Goodwin Avenue, Urbana, IL 61801


Figure 1
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  		Fig. 1. Seasonal mean CO2 evolution rates (a) and specific mineralization rates of soil organic carbon (RESPsp) (b) from no-tillage (NT) and conventional-tillage (CT) soils in DeKalb, Monmouth (from Yoo and Wander, 2006), and Perry, IL. If the letters above data from each location are not the same, then means were significantly different at P < 0.05.

 

Figure 2
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  		Fig. 2. Effect of conventional (CT) and no-tillage (NT) practices on soil organic carbon (SOC) sequestration on an equivalent volume basis in the 0- to 30-cm depth. If the uppercase letters above data are not the same, then site-based means were significantly different at P < 0.05. Means with different lowercase letters are significantly different at P < 0.05 within each site.

 

Figure 3
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  		Fig. 3. The effect of depth-weighted bulk density (a) and least limiting water range (LLWR) size (b) on specific soil organic carbon (SOC) mineralization rates in the no-tillage (NT) and conventional-tillage (CT) soils.

 




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