Field Test Analysis of Straw Reaper Combine for Optimized Operating Condition to Improve the Performance

The profitability of ex-situ straw management largely depends on the quantity and quality of straw recovered from the field. The straw reaper-combine is one of the widely used ex-situ straw management technologies being used to retrieve the leftover residue in the field after grain combine operation. Besides considering the positive implication of this technology in recent times, the quality of operation, which accounts for maximizing the performance parameters of straw reaper-combine in a wheat crop. The relationship among these parameters was established using multiple linear regression techniques through the regression equation. The ANOVA test of this experiment also established the significant (P<0.01) effect of forwarding speed and cutting height on all performance parameters. It was observed from the experiment that when the forward speed was increased while keeping the cutting height at a constant level the recovery percentage and specific energy consumption were decreased whereas, straw split percentage and actual field capacity were increased. Likewise, when cutting height was increased keeping the forward speed at a constant level the recovery and split percentage were reduced but, the actual field capacity and specific energy consumption were increased. In order to achieve maximum performance at optimum energy consumption, the straw reaper should be operated at a speed between 3-4 km/h with cutting height between 30-60 mm.