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This thesis deals with the nowadays tractors construction. Theoretical part is divided into three subgroups - tractor engine, powertrain and chassis. The problematics of emission limits is discussed in the first subgroup. Major part of second subgroup is devoted to hydro mechanical powertrain. Finally wheeled and tracked chassis construction, tyre construction and automatic tire inflation systems are described at the end of theoretical part of the thesis. Practical part devotes to methodology and field measurements with the aim on various weight distribution of the tractor. Measurements were realized with CASE IH Magnum 370 CVX tractor. Obtained values are processed into graphs and charts. Subsequently the dependencies of wheel slip and pull power properties on pulling force of the tractor are created. Conclusion of the thesis provides recommendations for optimal weight distribution of the tractor for pull power operations.

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The diploma thesis on the theme Analysis of the Output Parameters of Tractors Kit for Soil Preparation contains in theoretical part actual survey of most important parts of the tractors. The diploma thesis further includes description of tractors CLAAS ARION 640 with mechanical speed gearbox HEXASHIFT and continuous hydrostatic gearbox CMATIC and description of plow PÖTTINGER servo 45S NP, which were all together elements of the practical part. The field measurement took place in Jiřice at Miroslav on Znojemsko in august 2016. This measurement is processed in the practical part, which focuses on comparing tensile characteristics of both gearboxes and determining their influence on the tensile properties of the tractor. Results were tabular and graphically elaborated and the analysis of measured values was performed.

This thesis focuses on the description of 3D printing technologies using the FDM method, which uses deposition of molten thermoplastics and their subsequent cooling and solidification layer by layer. This unique structure then shows a strong anisotropy of mechanical properties and, as a result, their testing and print settings are very important. Tensile testing of plastic materials, including indicators of mechanical properties, are described in this thesis according to ČSN EN ISO standard. The practical part presents the concept of a device capable of performing these tests. The block diagram indicates the functional elements and the connections among them. Tensile strength test is described together with results processing. Necessary product documentation is also included.

Diploma thesis is dealing with proposal of suitable farm implements and technologies for tractors of over 250 kW according to chosen methodologies at agricultural business AGRO Slatiny a.s. The introduction specifies a brief characteristic of selected agricultural business which is followed by a description of soil processing methods and comparison of wheeled and crawler tractors. In the next section there is a characteristic of 3 powerful tractors of over 250 kW and implements which are used by those tractors for soil preparation. Furthermore there is a specification of main objective and applied methods. The main goal was calculation of original implement's parameters in regards to work efficiency and economic evaluation. In case of unsatisfactory results the objective is to propose new implements in order to work more efficiently and have better economic results.

The theoretical part of the diploma thesis deals with soil qualities which influence the soil processing. The soil processing itself is described in the theoretical part as well as advantages and disadvantages of the specific processing, a choice of technology for effective soil processing and economic aspects of the processing. In this part there is an extract describing a test of a tractor pulling and reasons for making the test of pulling in laboratory and field conditions. The practical part of the thesis deals compares two methods of a tractor pulling power during field tests. A belt tractor John Deere 8320 RT and a wheel tractor New Holland T7050 were tested. The target of a pulling test in ter-rain was to define which resistance makes a soil in specific conditions and which pulling power is needed for a certain working output on a given land. The results were pro-cessed and evaluated with computer technology. The whole measurement took place with support of a BEDNAR FMT company.