A methodology for on-farm cropping systems research /
Zandstra, H. G.
A methodology for on-farm cropping systems research / by H. G. Zandstra....[et. al. ] - Manila : IRRI , c1981. - 147 p.: ill. ; 23 cm.
Cropping systems
631.582 / ZAM
A methodology for on-farm cropping systems research / by H. G. Zandstra....[et. al. ] - Manila : IRRI , c1981. - 147 p.: ill. ; 23 cm.
Cropping systems
631.582 / ZAM