Distribution of Ideal Soil Composition Combined With 3 Dimensional Contour of Mahat Watershed for Sustainable Gambir Farming

Aflizar, aflizar (2020) Distribution of Ideal Soil Composition Combined With 3 Dimensional Contour of Mahat Watershed for Sustainable Gambir Farming. ICIST.

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Abstract

Abstract—The quality and efficiency of the 3-dimensional contour map of the Mahat watershed are very useful in helping to analyze the distribution of the ideal soil composition (Vw, Vg, Vs). Furthermore, the distribution of soil characteristics is compared with the topography to help integrate and sustainable Gambir farming in the Mahat watershed, which plays an important role in supplying 80% of the world's demand for catechins. It has been proven that the Surfer tool is able to create 3D maps of the contours of the Mahat watershed and 3D maps of the ideal soil composition after being compared with the realities in the field where there has been a significant increase in efficiency in data analysis, saving time, effort and cost in mapping for researchers and practitioners. It was found that the soil composition close to ideal for the % water volume (Vw) was found in Gambir farming (at altitude 250 - 1150 m ASL) and forest (at altitude 400 - 1600 m asl). The % gas or air volume (Vg) in Gambir farming, mixed garden, and forest are also close to the ideal soil composition. For % solid volume (Vs) it is found close to ideal in the mixed garden (at altitudes 250 - 1600 m ASL) and forests. The Sawah in the valley on the flat topography has the highest value Vw and the lowest value Vg. No ideal soil composition was found for Vw, Vg, and Vs owned by one land use in the Mahat watershed. Keywords—soil composition, gambir farming, nutrient, sustainable, 3D map

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