Assessment of Paddy Soil Quality Index Based on Differences in the Productivity of Paddy in Wonogiri Regency

Abstract

Rice or paddy is a staple food in some countries. The need for food is huge as the population growth increase, in Wonogiri regency majority of the land area is used as paddy field and land intensification is done to improve productivity. Land intensification raises the issues of having no definitive measure about the status of soil improvement after the cultivation practices of Paddy (Oryza sativa) has been done, in addition, the diversity of age utilization of paddy field by farmers resulting the differences in productivity that will affect the quality difference of the paddy field soil. The assessment is aimed to determine the soil quality function whether it’s good or bad after doing such land cultivation practices for a certain period. The assessment of soil quality is using data analysis method from the influential indicators based on the nature of at least the Minimum Data Set (MDS) that is obtained based on calculations of Principal Component Analysis (PCA). Indicators that affect, such as, C-Organic,Bulk Density, K-Available, N-Total, and average soil quality were obtained at all points of the sample with a diverse range of values. With the known SQI values, in the future the efforts to maintain and improve the quality of the soil can be done by considering several important factors.