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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Degradace motorového oleje ve sklízecí mlátičce
 Halenka, Milan
This Master's thesis focuses on the problematics of the diesel engine oil in the combine harvesters degradation. The first part focuses on the manufacturing process of the en-gine oils, on their structure, on the description of their properties and on their division into individual classifications. Types of the lubrication systems and the diagnostics of the engine oils are described next. Seven samples of oil were monitored, three of them were samples of used engine oil from the combine harvesters Claas, where the engine oil with viscosity grade 10W-40 was used. Next two samples were from used oil from the combine harvesters Case IH, where was the engine oil with viscosity grade 15W-40. Two samples of new oil of each kind were taken for the comparison of the engine oil degradation. Their physical and mechanical properties were compared afterwards. The results obtained are interpreted both numerically and graphically. In the conclusion, the evaluation and the results obtained are summarized.
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Technologie zpracování půdy a jejich vliv na zaplevelení kukuřice seté
 Halenka, Milan
This thesis focuses on soil tillage and its influence on weed infestation in growths of maize. The field trial was conducted on experimental lands of Mendel University in Žabčice, located in a maize production area. Monitoring of weed plants was carried out on lands treated under three different methods of soil cultivation. The results were processed by redundancy analysis (RDA). The conventional tillage showed the lowest amount of occurred weeds, Echinochloa crus-galli, Chenopodium album and Chenopodium hybridum were the most common species. The highest amount of weed species was observed on lands of direct sowing, species as Cirsium arvense, Stellaria media, Echinochloa crus-galli, Plantago major and Convolvulus arvensis were identified the most often. Species as Amaranthus spp. and Echinochloa crus-galli occurred most frequently on lands of minimum tillage.
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