RT Journal Article SR Electronic T1 Sorting out the environmental benefits of alternative agriculture JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 34 OP 41 VO 45 IS 1 A1 Crosson, Pierre A1 Ostrov, Janet Ekey YR 1990 UL http://www.jswconline.org/content/45/1/34.abstract AB