Soil erosion four cashew-based crops under two slopes categories.

Date

1985

Abstract

A field experiment conducted at San Jose, Roxas, Palawan from September to December, 1982, to evaluate the performance of the cashew tree and some cashew-based crops in minimizing soil loss under two slope categories. The relationship of soil loss with rainfall depth, duration, intensity and erosivity were also determined. The results of the study showed that at 21.7 percent slope, five-year-old cashew tree intercropped with sweet potato, five-year-old cashew tree intercropped with guinea grass and five-year-old cashed tree intercropped with soy-beans 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 were 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 erosivity. However, the correlation of soil loss with rainfall duration and rainfall intensity, although positive was low. As far as the cover crops 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 individuality as independent variables cannot be reliably used as prediction equations.

Document Type

Master Thesis

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 995 1985 A2 M34

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