RT Journal Article SR Electronic T1 Traditional Hopi agricultural methods JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 170 OP 171 VO 39 IS 3 A1 Deborah J. Prevost A1 Robert J. Ahrens A1 David M. Kriz YR 1984 UL http://www.jswconline.org/content/39/3/170.abstract AB