TY  - BOOK
AU  - Zehler, E. and others,
TI  - Potassium Sulphate and Potassium Chloride : Their Influence on the Yield and Quality of Cultivated Plants
U1  - 631 
PY  - 1981///
CY  - Berne
PB  - International Potash Institute
KW  - Fertilisers
KW  - Techniques, equipment & materials
ER  -