PT - JOURNAL ARTICLE AU - Alisa L. Gallant AU - Walt Sadinski AU - Mark F. Roth AU - Charles A. Rewa TI - Changes in historical Iowa land cover as context for assessing the environmental benefits of current and future conservation efforts on agricultural lands AID - 10.2489/jswc.66.3.67A DP - 2011 May 01 TA - Journal of Soil and Water Conservation PG - 67A--77A VI - 66 IP - 3 4099 - http://www.jswconline.org/content/66/3/67A.short 4100 - http://www.jswconline.org/content/66/3/67A.full