GENTLE CABBAGE HARVESTING

When harvesting cabbage by machine, the heads of cabbage are severely injured. Mechanically damaged heads of cabbage are poorly stored. Therefore, the machine technology of cabbage harvesting should provide protection of heads of cabbage from mechanical damage. The purpose of the research is to study the qualitative indicators of the operation of a multivariate cabbage harvester with various harvesting technological schemes. The considered technological schemes for harvesting cabbage include: careful shipment of heads in bulk of a universal vehicle (Scheme 1); careful point shipment of heads of cabbage into containers installed in the back of a vehicle (diagram 2); shipment of heads of cabbage on a flexible flooring installed in the vehicle, with their subsequent careful transfer to containers manually (Scheme 3); stowing heads of cabbage into containers on an accompanying trailer manually (Scheme 4). During the production check, under conditions typical for the main regions of mass marketable production of cabbage, the multivariate cabbage harvester steadily performed the technological process. At the same time, its quality indicators met the established agrotechnical requirements. Combine operation according to schemes 3 and 4 ensured the preservation of product quality to the maximum extent: damage to heads of cabbage did not exceed 5 ... 6%, the completeness of cabbage leaves removal was 95 ... 100%. Therefore, its use according to schemes 1 and 2 is recommended mainly when harvesting cabbage for short-term and medium-term storage, according to schemes 3 and 4 - when harvesting heads of cabbage intended for long-term storage

Evaluation of New Holland CR9080 Operation

The paper evaluates operation of the separation unit of NH CR9080 combine harvester. A considerable technical and technological progress has taken place in presently used harvesters. Among others, efficiency increased and equipment has been enhanced with elements which improve the operation quality. The objective of the paper was to determine the quality of the separating unit of a combine harvester New Holland CR9080. During the research, losses on screens and rotor, cutting height of rapeseed, mowing speed, rotation of fans, rotors and engine were determined. Relation of losses on screens to combine operation parameters was determined with a model of multiple regressions. The rotational speed of rotors, mowing speed and rotational speed of the combine engine have a significant effect on losses on screens at the rapeseed harvesting with the investigated combine.

Exploitation Assessment of New Holland CX780 Combine Harvester

The article presents an exploitation assessment of New Holland CX780 combine operation. Significant technical and technological progress is visible in modern harvesters. Inter alia, performance increased and elements improving the quality of work of harvesters appeared. The objective of the paper was to determine efficiency of the New Holland CX780 harvester operation including factors which affect its operation. Time structures of particular activities of combine operation and ratios of these times use were determined during tests. Yield value and moisture of collected seeds was determined. Studies proved that effective time of combine operation in the process of rapeseed and wheat grain harvesting was less than 50% and was caused by long preparation of a machine for operation. Preparation for operation of a combine influences its performance in the total time. It was 22% of the total operation time in case of wheat harvesting and 20% in case of rapeseed harvesting.