Journal of the Rubber Research Institute of Sri Lanka

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Effect of leaf litter on direct and indirect mobilization of P from apatite
(Rubber Research Institute. Agalawatta, 1987) Pathiratne, L.S.S.; Waidyanatha, U.P. De S.; Peries, O.S.
Leaf litter as direct and indirect means of improving P availability from apatite was tested. Application of leaf litter impo=roved the P uptake by indicator crops but did not influence the availability of P from applied apatite.
The effect of nitrogen rates and cutting frequencies on the productivity of two ecotypes of Panicum maximum interplanted with immature rubber
(Rubber Research Institute of Sri Lanka. Agalawaththa, 1982) Dissanayake, S.N.; Waidyanatha, U.P. de S.
Zero-Grazed pasture under immature Hevea rubber. improved productivity of Panicum maximum and P. maximum + Pueraria phaseoloides and their competition with Hevea
(Rubber Research Institute. Agalawaththa, 1982) Waidyanatha, U.P.de S.; Wijesinghe, D.S.; Stauss, R.