RT Journal Article SR Electronic T1 Ground lost and gained in 75 years of conservation at Coon Creek JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 102A OP 106A DO 10.2489/jswc.63.4.102A VO 63 IS 4 A1 Joseph Hart YR 2008 UL http://www.jswconline.org/content/63/4/102A.abstract AB