I. Introduction
Indonesia's land is made up of various geological (lithologic), terrain, and climatic formations, which are the main factors of soil formation and largely determine its potential for agriculture. Due to land conversion and degradation, the availability of potential agricultural land in Indonesia is limited. According to recent data, the rate of conversion of fertile agricultural land to non-farmland reaches no less than 110,000 ha/year, and some even estimate 145,000 ha/year, the decrease in the potential land has resulted in low yields of farmers. With these conditions, it should be able to exploit the potential of existing land by planting the right crops.