Effective Technique of Run Off Control on Sloping Upland Farming

Abstract

The aims of this study were to find out the effects of run off control techniques and cropping patterns on run off rate of sloping upland farming. A series of factorial experiments was conducted on a Lithic Dystrudepts located at three different sloping uplands in Malang, East Java. The area belong to the C type of Did em an climatic zone. The three run off control techniques were soil pit with vertical mulch (TI), soil pit with ridge and vertical mulch (T JJ, and soil pit with ridge (T3)' The two sequential cropping patterns were maize (Zea mays L.) - soybean (Glycine max (L.) Merr.) - maize (PI), and peanut (Arachis hypogaea) - maize - soybean (PlY. . The result indicates that run off control techniques decreqse rate of run off by 88%, for soil pit with ridge technique, 86% for soil pit with ridge and vertical mulch technique, and 84% for soil pit with vertical mulch technique. The relationship ofrainfallJx) with run off(y) can be expressed by y = 0.05x; r = 0.92 in cropped plot andy = 0.30x; r = 0.90 in bare plot.