Zandstra, H.G.Price, E.C.Litsinger, J.A.Morris, R.A.2007-11-121981-04-012007-11-121981http://hdl.handle.net/10625/7682Text1 digital file (158 p.)Application/pdfenCULTIVATION SYSTEMSAGRICULTURAL RESEARCHRESEARCH PROGRAMMESASIATESTINGCROP YIELDRESEARCH METHODSCROP DIVERSIFICATIONDESIGNMethodology for on-farm cropping systems researchWorking Paper