00329nam a2200097Ia 4500008004100000082002700041245004600068260005400114300001000168650005300178130903s9999    xx            000 0 und d  a577.1+581.1:631.83  L1  aPotassium in biochemistry and physiology.  aSwitzerlandbInternational Potash Institutec1971  a244p.  aPotassium fertilizers,Plants-Effect of Potassium