TY  - BOOK
AU  - 
TI  - FAO Fertilizer Bulletin No. 3 : Maximizing the Efficiency of Fertilizer Use by Grain Crops 
SN  - 9251009546
U1  - 631 
PY  - 1980///
CY  - Rome
PB  - F. A. O.
KW  - Fertilizer
KW  - Techniques, equipment & materials
ER  -