Assessment of Land Use Change Impacts on Land Capability in Ngadirojo, Indonesia

Abstract

Since the pro-investment program was implemented in 2011, Wonogiri District including Ngadirojo Sub-district has experienced a shift in the economic sector from agriculture to industry, and land conversion has occurred. This research aims to determine the rate of land conversion in the Ngadirojo Subdistrict and its effect on land capability class. The rate of conversion is determined based on the shrinkage of land use area from 2009 to 2020. The land unit for observing the land capability class is determined by overlaying the land use change map with the soil type map. Observation of land capability class is carried out on agricultural land that is experiencing conversion. As comparison data, land capability classes were observed at points that did not experience conversion. Land use change in the Ngadirojo Sub-district in 2009-2020 covering an area of 1,308.53 ha (14.03%) with a rate of conversion of agricultural land to non-agricultural areas of 264 ha (24 ha year -1 ). Changes in land use have a very significant effect on the land capability class. Land use causes soil permeability to be slower and degrades land capability. The recommended land management efforts in the research area are the addition of organic matter to soil properties and agroforestry system implementation.