RT Journal Article SR Electronic T1 Additionality in agricultural conservation payment programs JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 74A OP 78A DO 10.2489/jswc.68.3.74A VO 68 IS 3 A1 Roger Claassen A1 Eric Duquette A1 John Horowitz YR 2013 UL http://www.jswconline.org/content/68/3/74A.abstract AB