AGROTECHNICAL EVALUATION OF THE STRAW-CUTTING AND BROADCASTING COMBINE DEVICES OPERATION IN THE PROCESS OF DIRECT GRAIN CROPS HARVESTING
The results of assessment the quality of straw cutting by grain harvesting combines at different operation regimes are submitted in the article. The impact of harvesting conditions on the indices of straw chopping quality as dependent on the certain combine has been ascertained. Thus, the «John Deere S9500» combine in the trials with reduced load on the straw chopper demonstrated higher indices of chopping, while the РСМ-101 «Vektor-410», on the contrary, showed better results under high load of the straw chopper. The results of the «John Deere STS 95702» combine operation were unsatisfactory under all the regimes used. With increasing the high-speed operation of the РСМ-101 «Vektor-410» the quality of straw cutting during the technological process of grain crops harvesting was unstable. It is concluded that there has not been observed any distinct interconnection between the quality indices of straw chopping under different operation modes of the combines, as well as it is stressed that the studies on the processes taking place in the straw chopping and broadcasting device are really actual.