Effect of Compost and Blended NPS Fertilizers on Yield and Yield Components of Food Barley (<i>Hordeum Vulgare </i>L.) at Welmera District, Central Highland of Ethiopia

Soil nutrient depletion under losing of soil organic matter consequently continuous cultivation and low input are among the major issues that oblige sustainable productivity yield barley at Welmera area. A study was, hence, lead to explore impact compost NPS fertilizer combination on components food Holeta Agricultural Research Center Nitisols in central highlands Ethiopia 2019/2020 cropping season. To achieve this objective, a field trial was arranged randomized complete block design factorial arrangement. The treatments consisted four rates (0, 4, 8, 12 t/ha), five blended 100, 150, 200, 250 kg/ha) blanket recommended NP (60 kg/ha N + 69 P2O5) as standard check. Food (HB-1304 variety) used test crop. result revealed 50% day heading, 90% maturity, plant height, spike length were positively influenced by applied experimental plots. On contrary, synergistic interaction effect sourced from brought positive influence parameters (total number tillers, effective tillers per plant, grain spike, thousand-grain yield, biomass straw harvest index). Moreover, collective use (8 t/ha) mineral (150 has better-improved Likewise, outcome economic analysis showed application 8 t/ha 150 gave highest benefit 70528 Ethiopian birr ha-1 with maximum marginal rate return 1504%. Hence, current recommends maintain fertility sustain crop production combined best alternate integrated management choice position sole inorganic fertilizers for area reluctantly. Nevertheless, further studies different locations more than one season ought be considered provide conclusive recommendation production.