On-farm research manual : cropping systems research /
On-farm research manual : cropping systems research /
Department of Agriculture - Bureau of Agricultural Research.
- xvi, 215 pages : illustrations, graphs ; 26 cm.
Crops--Research--Philippines.
Farm management--Philippines.
Agricultural systems--Philippines.
S 602.5 / .B9521 1990
Crops--Research--Philippines.
Farm management--Philippines.
Agricultural systems--Philippines.
S 602.5 / .B9521 1990