00331nam a2200121Ia 4500008004100000245004600041260002800087300001200115650001600127650001800143650002500161650002300186220216s9999    xx            000 0 und d 0aNitrogen : Its role in rubber cultivation  bPlanters Bulletinc1971  a250-258  aFertilisers  aLeaf analysis  aNitrogen defficiency  aRubber cultivation