Soil classification in karstic lowland of Baraja (BRA) land system in Mangarabombang District Takalar Regency

Abstract

Abstract Soil characteristics in Mangarabombang Subdistrict Takalar Regency, according to some expert opinions, are classified as Vertisols soil order, but in the RePPPRot Land System Review Map, it’s still classified as an Inceptisols soil order. Therefore more detailed research is needed regarding the soil order at that location. According to Soil Taxonomy at the sub-group category, this research aims to determine the types of soil in the karstic lowland of Baraja (BRA) land system. The method used is the toposequence transect and the analysis of physical and chemical properties, including soil color, structure, texture, bulk density, C-organic, CEC, pH, COLE, electrical conductivity, and bases saturation. These research results are the soil in the Baraja land system is undulating (34 masl), and flat (20 masl) was classified as Vertisol Order with the Lithic Haplusterts Sub-Group with limestone as a parent rock. The soil is characterized by open and closed fractures periodic, and there is lithic contact. The soil in flat areas (10 masl) was classified as Inceptisol soil with the Vertic Haplustepts Sub-Group with highly weathered limestone as parent rock. A cambic horizon characterizes the soil with thin lamellae and an alteration process, but it has fractures closed and open periodically. Soil types formed in the karstic lowland of Baraja (BRA) land system in Mangarabombang Sub-District was Vertisol with the Lithic Haplusterts Sub-Group and Inceptisols with the Vertic Haplustepts Sub-Group. The type of soil formed is affected by dominant factors, including climate (low rainfall), the parent material (limestone), and topography.