TY  - GEN
AU  - Cooke, G. W. 
TI  - The role and importance of potassium in the agricultural systems of the humid tropics : the way forward
U1  - 631.41 
PY  - 1986///
CY  - Bern
PB  - International Potash Institute
KW  - Soil sciences
KW  - Soil chemistry
ER  -