Penilaian Indeks Kesuburan Tanah Berdasarkan Unsur N, P, K dengan Sistem Informasi Geografis di Lahan Pertanian Kecamatan Sumbersari

Abstract

Jember Regency is one of the highest rice producers in Indonesia, indicating that agricultural land in Jember Regency is classified as productive. However, agricultural land productivity in Sumbersari District is not included in the high category when compared to other districts in Jember Regency. Agricultural land productivity is influenced by several chemical elements in the soil such as nitrogen (N), phosphorus (P), potassium (K). The relationship between N, P, and K with plant growth is very close so that these elements are often used as parameters to determine the status of soil fertility. The integration of spatial data on agricultural land is a manifestation of the application of precision agriculture that can support more efficient and sustainable agricultural resource management. The methods used in this study include the Inverse Distance Weighting (IDW), Principal Component Analysis (PCA), and Soil Fertility Index (SFI). The results showed that the content of N, P, and K elements is spread across different categories, while the SFI calculation shows that the level of soil fertility in the study area has different spatial variations at each location. The integration of the SFI, PCA, and IDW methods can provide a more comprehensive spatial picture of the level of soil fertility. Information from the results of this study can be used as a basis for agricultural land management and as a reference in compiling more location specific fertilizer recommendations in Sumbersari District.