Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 1
Written by Galin TIHANOV, Manol DALLEV, Galya HRISTOVA, Ivan MITKOV
The article investigates grain losses in wheat harvesting with combine Claas Lexion 660. A thousand grain mean mass has been established, which is 49 g, whereas the mean mass of wheat in 1 m2 is as follows: at operation speed of 4.5 km/h it is 2.98 kg, at operation speed of 5.2 km/h it is 3.67 kg and at operation speed of 6.7 km/h it is 4.56 kg. In wheat harvesting these are between 0.49% and 0.75%. In addition, by increasing operation speed from 4.5 to 6.7 km/h, losses had increased by 34%. A linear relationship has been established between the percentage of grain losses and the working speed of the combine, as the coefficient of determination is R2 = 0.9945, i.e. 99% of the change in grain losses is due to the operating speed of the combine.
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