TY  - BOOK
ED  - Proceedings at the IPI Congression optimizing yields-the role fertilizers
TI  - Optimizing yields-the role of fertilizers / 
U1  - 631.81 
PY  - 1982///
CY  - Bern
PB  - International Potash Institute, 
KW  - Agriculture
KW  - Crops
KW  - Animal products
KW  - Fertilizer application
KW  - Economic aspects
KW  - Population growth
KW  - Soil fertility
ER  -