Effects of Blended NPSB Fertilizer Rates on Growth, Yield and Yield Components of Bread Wheat (Triticum aestivum L.) Varieties on Jimma Arjo District, Western Ethiopia

Wheat (Triticum aestivum L.) is one of the most important cereal crops in Ethiopia, however yield crop low mainly due to soil fertility management, lack using balanced fertilizer and improved wheat varieties. The experiment was conducted determine effect varieties, rate their interaction on components economic feasibility application for optimum bread Jimma Arjo district with four levels NPSB rates (0, 50, 100, 150, 200 kg ha-1) 64/20 NP three varieties (Ogolcho, Huluka Hidase) combined factorially laid out a Randomized Complete Block Design replications. soils experimental area exhibited high sand (36%) but relatively clay fractions (30%). Before sowing, site showed mean pH (H2O) value 5.52, organic carbon content 2.21%, total N (0.19%) available P (10.02%), matter (3.80%), boron 0.99 ppm.. main were significant all parameters except harvest index only seed per spike thousand weight interaction. highest grain 5801 ha-1 obtained variety applications 150 urea fertilizers. lowest 1599 ha-1grain recorded from Hidase no fertilizer. net benefit ETB 154288 marginal return 3210% cost ratio 66.19 unit investment production Urea ha-1. In conclusion, enhanced and, therefore, recommended production.