Newly converted land often has a thin topsoil layer, low organic matter content, and a soil structure that is either unstable or tends to be overly porous. Consequently, the process of paddy field formation is not yet complete, meaning that the ability of new paddy fields to absorb NPK is still very limited. This study aimed to evaluate the NPK nutrient status of paddy fields to provide location-specific, effective, and efficient NPK fertilisation recommendations. This study employed a Descriptive Exploratory Survey approach, involving field observations and descriptions of thirteen samples of newly converted paddy soil. Subsequently, each nutrient was analysed in the laboratory using various methods, such as phosphorus (Olsen), potassium (25% HCl), and nitrogen (Kjeldahl). The NPK nutrient content of the soil in the newly developed paddy fields was analysed using the Kriging semivariogram approach. Geostatistical analysis using ArcGIS 10.8 software was employed to interpolate the distribution of NPK nutrient content in the new paddy fields at the study site. The results of this study indicate that the NPK nutrient content of the soil in the new paddy fields in Booy Village, South Balantak Sub-district, is classified as low to moderate. Integrated efforts to improve soil fertility through inorganic fertilisation (such as urea, SP-36, or NPK) to provide rapid nutrient supply, combined with organic amendments to enhance nutrient uptake efficiency, microbial activity, and long-term fertility.
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