Browsing by Author "B. Y. Aminuddin"

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    Modelling pesticide and nutrient transport in the Cameron Highlands, Malaysia Agro-Ecosystems
    (Springer, 2005) W. Y. Wan Abdullah; B. Y. Aminuddin; M. Zulkifli
    Cameron Highlands has a long history of intensive horticulture especially vegetable and flower cultivation. This industry uses large amounts of nutrients and pesticides. Several simulation models were used to assess the movement of pesticides and nutrients in relation to agronomic practices in farm plots cultivated with cabbage and chrysanthemum.
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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.