00396nam a2200109Ia 4500008004100000082004100041245007700082260002700159300001000186600007600196650001400272130903s9999    xx            000 0 und d  a631.811.3(213)(100) 1985 (082.2)  M5  aPotassium in the Agricultural Systems of the Humid Tropics; Proceedings.  aThailandbI.P.I.c1985  a405p.  aColloquium of the International Potash Institute, 19th, Thailand, 1985.  aPotassium