PT - JOURNAL ARTICLE AU - Charles Benbrook TI - Protecting Iowa's common wealth: Challenges for the Leopold Center for Sustainable Agriculture DP - 1991 Mar 01 TA - Journal of Soil and Water Conservation PG - 89--95 VI - 46 IP - 2 4099 - http://www.jswconline.org/content/46/2/89.short 4100 - http://www.jswconline.org/content/46/2/89.full