Results of Qualitative Analysis of the Pulled Corn Pickers Work Effects during the Picking of Mercantile Corn

The main characteristic of the pulled corn pickers is that they drawn in one pass separate ear of corn from the stalk and made it husking, while it achieves a different quality of work. Quality of collectors depends on a several factors: the condition of crops, defining of relevant parameters for the operation, technical accuracy and staff skills. When the relevant parameters are not well aligned, the quality of work is significantly decrease, resulting in increased losses and poor quality of the collected mass in the bunker of corn pickers. Modern solutions of the used devices should provide high-quality collection in different conditions, with realized losses and damage of grain which do not exceed the tolerance value. The aim was to determine the effects of three types of pulled corn pickers ZMAJ 222 (type A), Berko 025 (type B) and Tornado 80 (type C) in the standard and the control variant, at corn picking in the observed area. Method is the standard methodology of custom test equipment for corn picking, complemented by the necessary assessments. The study was conducted in two phases. The work conditions were determined in the first phase, while the work effects depending on the defined parameters were determined in the second phase. The quality of the picked corn ear, grain losses, the degree of damage and the coronation of grain, the amount of cut wood chips were determined. The fuel consumption was determined by volume method and the effect was determined by chronometric method. In the crowd picked by picker type B was measured the highest content of whole intact corn cobs and amounted 97.15% and the lowest content of nonhusked corn ears in the amount of 8.45% (standard version). The minimum content of whole undamaged corn ear was in the crowd picked by picker type A 88.23% in the control variant. Also, at the same picker was measured the highest content of 17.24% nonhusked corn ears. Total losses were varied in the range of 1.42% (B picker, standard operating speed of 4.10 km h), to 5.67% control variant (A picker, 7.21 km h). The speed of movement significantly increased the amount of cut wood chips, so that it ranged from 18.68 31.53 cm (C picker type, standard, or control variant), and the other device 19.7-26.3 cm. Labour productivity ranged from 0.44-0.73 ha h.