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0ANEL 0stim acid Ammonium sulphate Annual Report 1968 Assistant average b.sc botryosa captafol cents per lb Chemistry Division clone trials clones coagulation continued correlated cost crop crown budding cumulative yields CV rubbers disease effect Enche factories fertiliser field latex grades groundnut gRtRt half-spiral Hevea Heveacrumb hevein hydroxylamine increased Institute intercropping investigated Johore Kelantan Kuala Lumpur laboratories large-scale trials latex latex concentrate latex vessels lb per acre lbRacre Legume lutoids maize Malaya Malayan Rubber Fund Malaysian Rubber manuring masterbatches mean yield methods monoclone natural rubber Negri Negri Sembilan nursery nutrient obtained panel changing Perak planted Planters plots polythene processing production programme R.R.I.M. Experiment Station rainguards replanting RRIC RRIM Rubb samples seedlings Selangor series soil showed smallholders SMR testing spores tappable tapping systems Tjir tons Total treatments virgin bark vulcanisation West Malaysia wind damage wooB yield stimulant