No abstract

No abstract

A pot experiment was conducted to assess the effects of coffee husk compost, lime and their combinations on chemical properties of acidic soil and coffee seedling growth at Haru Research Sub-Center nursery site in west Wollega zone in 2016/17. Soil and coffee husk compost samples were collected, prepared and analyzed before and at the end of experiment following the standard laboratory procedures. The experiment was laid out in a factorial experiment arranged in Randomized Complete Block Design with three replications. The treatments included four levels of lime (0, 1.6, 3.2 and 4.8 t ha -1 ) and coffee husk compost (0, 5, 10 and 15 t ha -1 ). The relevant soil data were collected and subjected to Analysis of Variance using SAS package and treatment means were compared at 0.05 probability using Duncan's Multiple Range Test. The results revealed that lime and coffee husk compost rates significantly increased the soil pH and decreased exchangeable acidity which resulted in improved nutrient availabilities of acidic soil. The highest values for soil chemical parameters such as organic carbon, total nitrogen, available phosphorus, cation exchange capacity and basic cations were obtained from the application of 15 t ha -1 coffee husk compost and combined lime and coffee husk compost at the modest levels of 3.2 t ha -1 lime and 10 t ha -1 coffee husk compost. From the study, it can be concluded that application of 15 t ha -1 compost or combining 10 t ha -1 of coffee husk compost and 3.2 t ha -1 of agricultural lime to acidic soil could be a promising alternative amendment for acid soil management and crop production in Haru areas, western Ethiopia.

Coffee is one of the most valuable primary products in the world trade, and also a central and popular part of our culture and the crop is cultivated in about 80 countries across the globe and entangles huge business worldwide. Industrial coffee production involves either a dry or a wet processing method for the removal of the shell and mucilaginous parts from the cherries resulting in the production of coffee husk and pulp, respectively. These main by-products generated by the coffee processing plants and are disposed into arable land and surface water causing environmental pollution due to presence of toxic materials such as caffeine and tannins. To contribute to safe disposal of solid biomass waste in coffee processing many research was conducted to assess the opportunities and challenges of expanded use of solid waste from coffee processing in energy and agricultural services in across coffee producing countries. Therefore the objective of this review was to summarize the literatures and the current knowledge on the utilization of coffee husk and pulp waste for soil amendment, for sustainable agricultural systems within small-scale farming in developing countries like Ethiopia, using these easily available materials as good option for developing plant-nutrient management strategies in highly weathered soil area.

No abstract