PT - JOURNAL ARTICLE AU - Peter C. Myers TI - Why conservation tillage? DP - 1983 May 01 TA - Journal of Soil and Water Conservation PG - 136--136 VI - 38 IP - 3 4099 - http://www.jswconline.org/content/38/3/136.short 4100 - http://www.jswconline.org/content/38/3/136.full