CHARACTERIZATION OF CILEMBU IPOMOEA BATATAS TYPICAL AGRICULTURAL LAND USING ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) AND MICROTREMOR APPROACHES

Abstract

Agricultural productivity is highly correlated with soil physical characteristics. Generally, the characterization of agricultural land is done traditionally, but this research raises a new problem in agriculture where the characterization of the physical properties of agricultural land is determined based on microtremor data processed using the HVSR method. Determination of the physical characteristics of the soil in this study was conducted to determine the relationship between the physical properties of the soil on the productivity of sweet potato farming land. This research was conducted on sweet potato farms in Cilembu village. The results of this study provide information about the structure of shallow soil layers in Cilembu sweet potato farms, also can be used by farmers to determine good land for planting sweet potato by knowing the thickness of the layer and the friability of the soil based on the value of the dominant frequency and amplification obtained from microtremor processing data. The results of HVSR method show that the more fertile areas frequency values are in range 9 – 14 Hz, and amplification from the range 2.5 – 4. Meanwhile, the range of resistivity values shows a quite large value in range 100 – 2400 Ωm, indicated that the soil in the Cilembu area originates from weathering of young volcanic rocks.