TY  - BOOK
ED  - Philippines.
TI  - On-farm research manual : : cropping systems research 
AV  - S 602.5 .B9521 1990
PY  - 1990///
CY  - Quezon City, Philippines
PB  - Department of Agriculture - Bureau of Agricultural Research
KW  - Crops
KW  - Research
KW  - Philippines
KW  - Farm management
KW  - Agricultural systems
ER  -