TY  - BOOK
ED  - Food and Agriculture Organization of the United Nations.
TI  - Maximizing the efficiency of fertilizer use by grain crops
SN  - 9251009546
U1  - 631.8 21st ed.
PY  - 1986///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Fertilizers
KW  - Grain crops
ER  -