RT Journal Article SR Electronic T1 Consider impact of resource use and timing on sustainability JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 5A OP 5A DO 10.2489/jswc.64.1.5A VO 64 IS 1 A1 Peter E. Black YR 2009 UL http://www.jswconline.org/content/64/1/5A.abstract AB