Browsing by Author "Weerasuriya, S.M."

Now showing items 1-3 of 3

Effect of potassium and magnesium on growth of young Hevea brasiliensis

Weerasuriya, S.M.; Yogaratnam, N. (Rubber Research Institute. Agalawatta, 1988)

The effect of potassium and magnisium fertilisers on growth of young Hevea brasiliensis were studied using clones PB 86, RRIC 100, RRIC 103, and RRIC 121 with the objective of determining the requirement of these elements ...
Effects of pottasium and magnesium on leaf and bark nutrient contents of young Hevea brasiliensis

Weerasuriya, S.M.; Yogaratnam, N. (Rubber Research Institute. Agalawatta, 1989)

Leaf and bark analyses provide evidence of uptake of K and Mg from applied K and Mg fertilisers respectively. Efficiency of uptake appears to have however been influenced by the level of applied K and Mg, pre - treatment ...
Ferilizer responses in mature Hevea under Sri Lankan conditions

Yogaratnam, N.; Weerasuriya, S.M. (Rubber Research Institute. Agalawatte, 1984)

The results of three out of a series of eight experiments that have been in progress (most of them) since 1976, are discussed. Yield increases in the existing plantations could be obtained with increased applications of ...