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Moving of tractors and mobile systems can be divided in two groups: moving trough the inner parts of fields, and through the headlands. On headlands, soil compressing is more intensive due to lower moving speeds while turning, which enable soil to be exposed longer time to the normal charge, and to get more compressed. Under the influence of pressure of mobile machines and other factors, change of soil appears causing unfavorable conditions for growth and development of crops, which is being manifested by permanent soil damage, yield decrease, and other costs increase. The aim of these trials was to determine influence of soil compressing at headlands and inner parts of fields on wheat yields, as the most present crops in agro-ecological conditions of Northern Kosovo and Metohija. Soil compressing has been measured by Eijkelkamp penetrometer, at the following depths: 0-20 cm. Results of the trial indicate that during two years of trials, soil compressing at headlands was germination 31,88% higher compared to the inner parts of fields, while increase of soil compressing at the headlands before harvesting was 40,52 in average. The yields of wheat at the inner parts of the fields compared to those at the headlands were 50.98% higher. .

Rye is a farming culture that is important as bread wheat. It is excellent fodder either the green or in the bran, flour or grain. The rye grain is used for the production of alcohol, vinegar and starch, cellulose, lignin, furfurol, good quality paper and seeds in the pharmaceutical industry. The process of production of rye grain on the principle of 'grain-grain', can also occur through the sowing of winter rye. Sowing units take up important role in the technological process of sowing of winter rye as the dominant in agro-ecological conditions in northern Kosovo and Metohija. The very process of sowing is followed by a series of specific features that interact with the effects of applied work of narrow line seeder significantly affect the amount of actual yield of winter rye and profitability of its production. It is practically impossible to remove omission in the process of winter rye sowing. The aim of this research was to determine the quality and reliability of different narrow line seeder of rye based on field-laboratory research and exploitation in the agro-ecological conditions of northern Kosovo and Metohija, depending on defined parameters. These results indicate the advantages and disadvantages of the applied sowing aggregates concepts. .