PT - JOURNAL ARTICLE AU - William Lockeretz TI - Energy implications of conservation tillage DP - 1983 May 01 TA - Journal of Soil and Water Conservation PG - 207--211 VI - 38 IP - 3 4099 - http://www.jswconline.org/content/38/3/207.short 4100 - http://www.jswconline.org/content/38/3/207.full