Effect of Coffee Husk Compost and NPS Fertilizer Rates on Growth and Yield of Coffee ( Coffea arabica L .) at Haru Research Sub-canter, Western Ethiopia

Application of inorganic and organic fertilizers is the cheapest sources for replenishing plant nutrients in agricultural soils. However, selecting the optimum combination of these resources based on soil type and crop species were necessary. In this view, a field experiment was conducted at Haru research sub-center to assess the effect of coffee husk Compost and NPS Fertilizer rates on soil growth and yield and yield components of coffee in 2018/2019 cropping season. The treatments used were the combination of different rates coffee husk compost and NPS fertilizers rate, and laid out in randomized complete block design with three replications. The combined application of coffee husk compost and NPS fertilizers rate were significantly increased plant height of coffee. Coffee husk compost at (7.5 t ha-1) and NPS fertilizer at (50 kg NPS ha-1) has improved yield of coffee crop. Integrated NPS fertilizer and coffee husk compost with different rates improved coffee yield and yield components. Therefore, the use of 7.5t ha-1 coffee husk compost and 50 kg ha-1 of NPS fertilizer can be the best alternative integrated soil fertility management option in place of the sole application of inorganic fertilizers at study area tentatively. Nevertheless, in order to give conclusive recommendation further research studies are needed for more soil types and coffee crop varieties.