Performance of Single Axle Tractors in the Semi-Arid Central Part of Ethiopia

Performance evaluation of three single axle tractors namely Dongfeng15 hp and 12 hp Chinese made walking tractors and Vari6.5 hp Czech Republic made, were conducted at the Melkassa Agricultural Research Center (MARC). Drawbar and field performance data were recorded and analyzed. The experimental plots were laid side by side in a randomized complete block design (RCBD). The maximum drawbar pull in Newton (N) generated by DF-15 tractor at 1500 engine rpm settings (three-fourth load) were 2524.9, 2499.4 and 2125.34 in 1st, 2nd and 3rd gears respectively. In the same order maximum drawbar pull for DF-12 tractor were 2268.81, 2111.38 and 2061.24N. Similarly field performance tests conducted on equipment test field at MARC indicated highest average field capacity, field efficiency and ploughing depth for DF-15 tractor but least for Vari tractor which consumed much higher fuel per unit area than the two DF models. Consequently from the standpoint of pulling capability and operational efficiency, DF-15 model tractor (WT) was preferred and advanced for comparative agronomic evaluation with conventional animal power technology (AP).The result showed that grain yield(kg/ha) 2.386 and 2.184 (ton/ha) respectively for WT and AP were not significantly different (P<0.1).