TY  - GEN
TI  - Nutrient balances and the need for potassium: proceedings of the 13th IPI-Congress
U1  - 631.83 
PY  - 1986///
CY  - Switzerland
PB  - International potash institute
KW  - Potassium fertilizers
KW  - Fertilizers,soil conditioners,growth regulators
KW  - Agriculture and related technologies
KW  - Specific techniques
ER  -