The research activity was carried out in two purposively selected districts namely Merti and Chole from Arsi zone with the objectives of evaluating the performance and profitability of the multi-crop thresher under farmers’ management, creating awareness on the importance of the technology and enhancing farmers’ knowledge and use of the technology. Four kebeles were purposively selected based on their accessibility and four framers research extension groups composed of members representing male, female and youth were organized to undertake the demonstration. Practical training was given to a total of ninety two farmers on OARI-Assela Model-3 Multi Crop Thresher technology. The demonstration was conducted on four hosting farmers from FRGs. The results of the study depict that average threshing capacity of multi crop thresher for wheat and sorghum were 21.5 and 50 quintals in eight working hours. Whereas the average threshing capacity for wheat and sorghum 3.6 and eight 8.5 quintals in eight working hours. The demonstrated thresher machine had relative advantage over traditional practice in terms of reducing post-harvest crop lose by 2.4 quintals. Net income of farmers increased from 31, 375 birr to 37,530 birr for wheat and 10,125 birr to 12,310 birr for sorghum because of using multi crop thresher. Thus, OARI Model Multi crop thresher was recommended for further scaling.

Keywords: Demonstration, Multi crop thresher, Wheat, Labor, Sorghum and Threshing.

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