Los elementos mayores en el follaje de Hevea brasiliensis y su inter-relación

Abstract

The "normal" sanges of major element valions in subber foliage as proposed by Beanfils are unsuitable for use on Dunlop Malayan estates New values for the "normal" ranges of N/P, N/K, K/P, K/Mg and Mg/P are calculated from analytical results on local leaf material. Yields of a manurial experiment are examined in relațion to those "normal" values and it is evident that these ralnes are not "optimuni".