Yulnafatmawita, Yulnafatmawita and Nasution, S.F. and Adrinal, Adrinal
(2013)
EROSION DYNAMICS AND NUTRIENT LOSS AT THREE PHASES OF CORN GROWTH UNDER WET TROPICAL REGION, WEST SUMATRA INDONESIA.
In: The East and Southeast Asia Federation of Soil Science Societies, 21-24October 2013, Bogor, Indonesia.
Abstract
Soil erosion which is considered as the main problem for agricultural sustainability could be affected by, besides climate, also seasonal coverage of vegetation. A research about dynamics of erosion at different phase of corn growth was conducted at Ultisol Limau Manis, wet tropical region West Sumatra. The objective of the research was to find out amount of soil eroded at three different stages of corn growth, as well as the nutrient carried. Three different slopes (3%, 15%, and 25%) were employed for cultivating corn. The result showed that average runoff and erosion at each slope decreased by 14% from 1st to 2nd month of corn growth, and then increased again at the 3rd month. Among the slopes, the highest amount of soil eroded was from corn plot at 25% slope. Amount of soil eroded positively correlated to the amount of runoff (R2=0.84) but not to concentration of nutrient loss.
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