Potassium in tropical crops and soils
"International Potash Institute, Bern, Switzerland"
Potassium in tropical crops and soils - 1973 International Potash Institute Berne - 603
"631.811.3+631.416.4(213)""1973""(082.2) L4"
Potassium in tropical crops and soils - 1973 International Potash Institute Berne - 603
"631.811.3+631.416.4(213)""1973""(082.2) L4"


