RT Journal Article SR Electronic T1 Nitrate leaching hazard index developed for irrigated agriculture JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 90A OP 95A VO 60 IS 4 A1 Laosheng Wu A1 John Letey A1 Christine French A1 Yvonne Wood A1 David Birkle YR 2005 UL http://www.jswconline.org/content/60/4/90A.abstract AB