A 3.6 m combine harvests a 20 m strip. Walker material8.5 kg contains 100 g free and 50 g unthreshed grain; shoe material5.5 kg contains 250 g free and 80 g unthreshed grain. Grain tank collection16.5 kg. Find grain yield (tonne/ha) and cylinder loss (%).
Total grain=16.5+.100+.050+.250+.080=16.98 kg over 72 m². Yield=16.98(10000)/(72×1000)=2.3583 tonne/ha. Cylinder loss is unthreshed grain, (.050+.080)/16.98×100=.7656%. Thus **2.36 and .77, A**. Straw/chaff masses are not grain yield.
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