PT - JOURNAL ARTICLE AU - Ronald F. Follett TI - US agriculture's relationship to soil carbon AID - 10.2489/jswc.64.6.159A DP - 2009 Nov 01 TA - Journal of Soil and Water Conservation PG - 159A--165A VI - 64 IP - 6 4099 - http://www.jswconline.org/content/64/6/159A.short 4100 - http://www.jswconline.org/content/64/6/159A.full