RT Journal Article SR Electronic T1 Potential of precision conservation agriculture as a means of increasing productivity and incomes for smallholder farmers JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 171A OP 174A DO 10.2489/jswc.66.6.171A VO 66 IS 6 A1 Jenrich, Michael YR 2011 UL http://www.jswconline.org/content/66/6/171A.abstract AB