TY  - BOOK
TI  - Potassium in soil; proceedings
U1  - 631.416.4 1972 (063)  L2 
PY  - 1972///
CY  - Landshut
PB  - International Potash Institute
KW  - Colloquim on Potassium in Soil, 9th, Landshut, 1972.
KW  - Soil-Potassium content
ER  -