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Sustainability of current agricultural practices in the Cameron Highlands, Malaysia
(Springer, 2005) B. Y. Aminuddin; M. H. Ghulam; W. Y. Wan Abdullah; M. Zulkefli; R. B. Salama
A study on the sustainability of these agro-ecosystems was conducted. Results indicated that soil loss was in the range of 24-42 ton/ha/yr under vegetables and 1.3 ton under rain-shelter. Sediment load in the vegetable sub-catchment reached 3.5 g/L, 50 times higher than that associated with flowers under rain-shelter and tea. The sediments contained high nutrient loads of up to 470 kg N/ha/yr. The N, P and K lost in runoff from cabbage farms was 154 kg/season/ha, whereas in chrysanthemum farms it was 5 kg. In cabbage farms, the N, P, and K lost through leaching was 193 kg/season/ha. The NO3-N concentration in the runoff from the cabbage farms reached 25 ppm but less than 10 ppm in runoff from rain-shelters. Inorganic pollution in the rivers was within the acceptable limit of 10 ppm.