Soil Test Based Fertilizer Calibration for Common Bean (Phaseolus vulgaris L.) Varieties of the Southern Ethiopia

Abstract

Blended Nitrogen, Phosphorus, Sulfur, and Boron fertilizer calibration foxr optimum common bean (Phaseolus vulgaris L.) varieties yield was used to assess the effect of different rates of blended fertilizer on growth, yield and yield components, and nutrient use efficiency of common bean varieties and to identify economically feasible rates of blended fertilizer at Meskan District, Southern Ethiopia during 2020 crop season. The experiment had six treatment levels of blended fertilizer (0, 50, 100, 150, 200, and 250 kg·ha−1), and two common bean varieties were arranged in a randomized complete block design with three replications. Soil samples of the experimental plots were analyzed and used as blended fertilizer calibration to estimate soil nutrient supplies and recommend fertilizer. The results revealed that growth, yield, and yield components were highly significantly $\left(p\le 0.05\right)$ affected by the main effect of varieties and application of blended NPSB rates. The interaction of varieties and blended fertilizer shown a significant $\left(p\le 0.05\right)$ effect on all parameters. The partial budget analysis indicated that the highest net benefit of 67665 ETB ha−1 was obtained from the Nasir variety with the application of 100 kg·ha−1. Therefore, growing the Nasir variety with blended fertilizer rates of 100 kg·ha−1 is economically feasible for the studied soil type and different locations.