TY  - BK
TI  - Manual de fertilidad de los suelos
PY  - 1988///
CY  - Atlanta, GA (USA)
PB  - PPI, 
KW  - Fertilizer application
KW  - Npk fertilizers
KW  - Soil chemistry
KW  - Soil fertility
KW  - AGROVOC
N1  - Also available in Spanish -- The library has the slides in INVENTORY OF TRAINING MATERIALS
ER  -