For the evaluation of this diploma thesis I have chosen four different processing machines with various working organs. There were reversible plow Lemken Opal 90, plate cultivator Horsch Joker 8 RT, blade cultivator Farmet Duolent DX 300 N and combined cultivator Väderstad TopDown TD 500. Raitings were carried out on lands with very similar features to get the most advantageous possible comparison. The thesis contains characteristics of the companies and technical data of compared machines, where the machines differences are obvious, because each machine is designed and assembled for different purpose of soil processing. The fact is that each machine excelled in different type of measuring from the qualitative indicators' point of view. The best cultivation of plant residues came from the plow Lemken Opal 90. On the other hand, Väderstad TopDown TD 500 had the most decaying effect on post-harvest residues.

The diploma thesis is aimed at a comparison of tine and disc cultivators by several parameters which are most affecting the quality of a soil cultivation, and in the effect of the epigeic fauna, represented by ground beetles (Carabidae). Experiment was carried out twice during the season (after a harvest of wheat and rape) while soil was being cultivated with disc cultivator Lemken Rubin or tine cultivator Horsch Tiger. The experiment was carried out on the fields of ZD "Vysočina" Zbýšov and measured parameters were: plant residue decomposition, cultivation depth, diameter of aggregates, weed infestation and crop plant emergence, and abundance of ground beetles. Using the statistic tests, it was found, that almost every parameter describing the quality of the cultivation was influenced by the type of the cultivator. Tine cultivator had a higher decomposition of plant residues. This difference was more obvious when cultivating the field after rape harvest (P < 0.001) than field after wheat harvest (P < 0.01). Tine cultivator was more precise with keeping the cultivation depth as planned. Disc cultivator had a higher crumbling capacity. At the higher speed the machines were more inclining to come out of the ground at higher speeds (P < 0.05). A cultivation had a very negative influence on Carabidae population. On a rape stubble there was a 193 specimens caught in traps before the cultivation with two dominant species - Pseudoophonus rufipes and Pterostichus melanarius. Only 41 specimens was found in the traps after the cultivation.

Introduction of final thesis deals with description of difficulties which face agricultural machines for soil processing in public traffic. It is followed by control calculations of tractor hitch and Failure Mode and Effect Analysis. Second part contains brief description of exact machine type and its main components. Following part is concerned about security and legislative requirements for transportation of carried cultivators on roads. For more this part describes, experimental measurement and calculation of dynamic loads, which are further used as input for strength analysis. Fifth part describes preparation of numeric model, strengths analysis of original frame and following sixth part brings frame editing and results of strength analysis with additional minor changes.