TY  - BOOK
ED  - Food and Agriculture Organisation of the United Nations 
TI  - Fertilizer use under multiple cropping systems
SN  - 9251014078
U1  - 631.8 21st ed.
PY  - 1983///
CY  - Rome
PB  - Food and Agriculture Organisation of the United Nations
KW  - Cropping systems
ER  -