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Published online 2 June 2005
Published in Soil Sci Soc Am J 69:1078-1085 (2005)
DOI: 10.2136/sssaj2004.0215
© 2005 Soil Science Society of America
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The Relationship between Carbon Input, Aggregation, and Soil Organic Carbon Stabilization in Sustainable Cropping Systems

Angela Y. Y. Kong*, Johan Six, Dennis C. Bryant, R. Ford Denison and Chris van Kessel

Dep. of Plant Sciences, Univ. of California, Davis, CA 95616



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  		Fig. 1. Relationship between sequestered soil organic carbon (SOC) and cumulative carbon (C) input across the 10 different cropping systems at the LTRAS site (Long-Term Research on Agricultural Systems, Davis, CA, USA). Vertical and horizontal error bars indicate standard errors from the means of the SOC sequestered and cumulative C input level, respectively.

 


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  		Fig. 2. Trends in aggregate-associated carbon (C) across the C input gradient determined for the 10 cropping systems at the LTRAS site (Long-Term Research on Agricultural Systems, Davis, CA, USA). Vertical and horizontal error bars indicate standard errors from the means of the aggregate-associated C and cumulative C input level, respectively.

 


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  		Fig. 3. Cumulative carbon (C) input levels for the 10 cropping systems at the LTRAS site (Long-Term Research on Agricultural Systems, Davis, CA, USA) regressed against percentages of small macroaggregate-C derived from soil organic matter fractions that were isolated from the small macroaggregates. Vertical and horizontal error bars indicate standard errors from the means of the percentage of small macroaggregate-C as soil organic matter (SOM) fraction-C and the cumulative C input level, respectively.

 




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The SCI Journals Agronomy Journal Crop Science
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and Life Sciences Education		 Vadose Zone Journal
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Environmental Quality		 The Plant Genome
Copyright © 2005 by the Soil Science Society of America.