00403     2200157   4500001002100000035002000021245005600041260002300097300003500120084001100155082001100166650003400177650001600211990000900227990000900236INLIS000000000004292  a0010-0321000376  aA methodology for on-farm cropping systems research  aManilabIRRIc1981  aviii, 150 p.c: ills. ; 23 cm.  a631.58  a631.58  aSISTEM PERTANIAN - PENELITIAN  aPENELITIAN.  a1456  a1456