RT Journal Article SR Electronic T1 Soil carbon sequestration and aggregation by cover cropping JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 329 OP 339 DO 10.2489/jswc.70.6.329 VO 70 IS 6 A1 R. Lal YR 2015 UL http://www.jswconline.org/content/70/6/329.abstract AB