on-farm research and management text Los Banos IRRI 1984 196 p. ill ; 23 cm + lap SISTEM PERTANAMAN CROPPING SYSTEMS ASIA 631.58 631.58 INLIS000000000001638 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)