<b>Improving the Productivity of Common</b> <b>Bean</b><b> </b><b>(</b><i>Phaseolus Vulgaris</i> L<b>.)</b><b> </b><b>Using the Optimum Blended Inorganic Fertilizer Rate Recommendation</b>

The study aimed to determine the optimum NPSB (18.9% N, 37.7% P2O5, 6.95%S, and 0.1% B) fertilizer rate for the maximum common bean grain yield and profitability. The field experiment was conducted in two locations in the 2020 and 2022 cropping seasons. The treatments were (0, 25, 50, 75, 100, 125, 150, 175, and 200 kg ha-1 NPSB fertilizer rates) and planted using a randomized complete block design with three replications. An economic analysis was conducted for grain yield using the CIMMYT procedure. The analysis of variance indicated that the application of NPSB fertilizer significantly (p &lt; 0.05) influenced plant height, number of pods per plant, number of seeds per pod, hundred seed weight, biomass yield, grain yield and harvest index. The combined location mean showed that the maximum grain yield (3124 kg ha-1), followed by 2710 kg ha-1, was produced by applying 125 and 100 kg ha-1 NPSB blended fertilizer rates, respectively. The economic analysis revealed that applying 125 kg ha-1 of NPSB fertilizer earned the highest net benefits (140453.2 ETB ha-1) with the highest marginal rate of return (1745.26%). Therefore, a 125 kg ha-1 NPSB fertilizer rate is suggested in the study area and in similar soil types.