<![CDATA[Maize (Zea mays L.) is an important food and feed crop in Indonesia, but production remains insufficient to meet rising demand. Inceptisols have good potential for maize cultivation; however, their low fertility and limited nitrogen (N) and phosphorus (P) availability restrict crop growth and yield. Although single and compound fertilizers are widely used, information on effective fertilizer combinations for improving nutrient availability and maize productivity in Inceptisols is still limited. This study evaluated combinations of single N, P, K fertilizers and NP granular fertilizer to improve soil fertility, nutrient uptake, chlorophyll content, and maize yield. A randomized complete block design with nine fertilizer treatments and three replications was applied. Treatments included an unfertilized control, recommended N, P, K, 100 kg ha⁻¹ NP granular fertilizer, and combinations of ¼–1 recommended N, P, K rates with 25–100 kg ha⁻¹ NP granular fertilizer. Soil nutrient availability, nutrient uptake, chlorophyll content, and yield components were analyzed using analysis of variance, Duncan’s multiple range test (5%), and correlation analysis. The combination of ¾ recommended N, P, K fertilizer with 75 kg ha-1 NP granular fertilizer produced comparable performance to the full recommended dose in enhancing nutrient availability, uptake, chlorophyll content, and yield, making it a highly efficient fertilization strategy for Inceptisols. The combination of ¾ recommended N, P, K fertilizer with 75 kg ha⁻¹ NP granular fertilizer produced the best overall performance, enhancing nutrient uptake, chlorophyll content, and maize yield, making it an effective fertilization strategy for Inceptisols.]]>
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