Smucker, A. J., D. Santos, and Y. Kavdir. 1997. Concentric layering of carbon, nitrogen and clay within soil aggregates from tilled and non-tilled agroecosystems. Pages 129-140 in J. Caron, D. A. Angers, and G. C. Topp, eds. Third Eastern Canada Soil Structure Workshop Proceedings. Universite Laval, Sainte-foy, Quebec, Canada.
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