Soil erosion in four cashew-based crops under two slope categories
1985
Madarcos, B.S.
Results showed that at 21.7 percent slope, five-year-old cashew tree intercropped with sweet potato; guinea grass, and soybeans were effective in minimizing erosion. These treatments had a projected seasonal soil loss of 8.13, 9.96, and 11.70 tons per hectare respectively. Following these treatments in decreasing order of effectiveness were five-year-old cashew intercropped with corn, five-year-old cashew and three-year-old cashew. At 39.2 percent slope, the same order of effectiveness was observed. However, none of the treatments could be considered efficient in minimizing soil loss. The results of the regression and correlation analyses showed that soil loss was positively and highly correlated with rainfall depth and rainfall erositivity. However, the correlation of soil loss with rainfall duration and rainfall intensity, although positive was low. As far as the cover crops used are concerned, the low correlation shows that the regression equations that were developed using soil loss as the dependent variable, rainfall duration and rainfall intensity individually as independent variables cannot be reliably used as prediction equations
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