This work aims to analyse tractors operational data related to works they performed. Grass silage harvest and potato planting were analysed in detail. Evaluation was based on information acquired from the telematics systems, which were installed in the machines. The systems functions were also introduced, its potentials were described and they were compared to each other. Telematics systems marketing communication strategy was also prepared.

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No description available.

The aim of the contritbution was to study potato (Solanum tuberosum L.) tuber protein concentration during growing season in dependence on actual ontogenesis stage of the potato plant. The changes in tuber protein concentration were studied on two potato cultivars - Adora (very early maturing) and Bionta (late maturing). The trial was established under field conditions on the site České Budějovice (380 m). Continuous ore sampling was aimed at following parameters evaluation: average tuber weight, dry matter concentration, crude protein concentration and protein concentration. Early maturing cultivar Adora showed rapid increasing of biomass from the start of ontogenesis and at the same time rapid decreasing of nitrogen compounds and pure protein concentration. The late maturing cultivar Bionta showed much more slow formation of biomass however the decreasing of nitrogen compounds and pure protein concentration was also recorded. Significant effect of ontogenesis stage on crude as well as pure protein concentration was evaluated. Significant effect on crude and pure protein concentration had also cultivar.

This thesis deals with the factors responsible for induction of the formation of tuber potato (Solanum tuberosum L.) in in vitro conditions. The aim was to observe cultivation of the nodal segments of stems on the induction medium with reduced content of inorganic nitrogen 12 umol, 80 g/l sucrose and the addition of 10 mg/l BA for the for-mation of tubers. The frequency of tuberisation was evaluated, as well as morfological changes, size and weight of the tubers. Three groups of explants were established diffe-ring in lenght of cultivation on the induction medium. These were monitored for chan-ges in the content of endogenous ABA in the nodal segments of stem and stolon. Moni-toring of the changes in content of endogenous cytokinin, nitrogen content, production of ethylene, ethane and CO2 was performed as well. Permanent microscopic preparations were prepared to detect transformation of the axillary bud into stolon, resp. tuber. Increased content of ABA during the tuber formation demonstrates its effect on tuberi-zation. Amongs cytokinins, the biggest effect of cytokinins on tuberization has BA, iP and iPR. Conversely, Z and ZR had no influence. Contents of ethylene, ethane,CO2 and nitrogen are related to the lenght of culturing on the induction medium.

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The aim of my diploma thesis was to evaluate the effect of different doses of urea and UreaStabil fertilization on yield, tuber size and quality of potato tubers. A field experiment was carried out at the research station Valečov (Valkom Ltd.), the branch of the Potato Research Institute in Havlíčkův Brod during the years 2013 and 2014. Seven variants of fertilization were monitored in four repetitions of various doses of nitrogen fertilizer application as urea and UreaStabil and were compared to the unfertilized check variant. Two potato varieties, each with different lenght of the growing season, an early Karin and mid-early Red Anna, were used for comparison.

This diploma thesis deals with the influence of fertilizer with urease inhibitor on filed and quality of potatoes on table potato varieties. Varieties selected for field trials were selected according to the different length of the growing season. In a field experiment was used variety Karin, which is among the early varieties and Red Anna, which is among the semi-early variety. The results were from a two-year field trial, which were established in 2013 and 2014 on the experimental field of station school farm of Mendel university in Žabčice.

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The thesis on the topic of the influence of the time period distance of the harvest from the end of the vegetation on the occurrence of "potato fenkines on the bulbs." There were 11 varieties of the potatoes chosen for the observation. Their vegetation was terminated by the desication resource called Reglone. From the end of the terminated vegetation during 10 days until the harvest there were 4 samples taken and they were evaluated on the occurrence and it's percentage of the "potato flakiness on the bulbs" in accordance with the scale of Wenzel and Demel (1976). There were there varietes selected for the evaluation; Flavia (VR), Riviera (VR), Rosara (VR), Merida (R), Adéla (R), the Baccara (R), Marabel (R), Ditta (PR), Laura (PR), Maréna (PP) and Saturn (PP). The achieved results of the "potato flakiness" weere evalunted statistically. The aim of the evlution of the ("potato flakiness on their bulls") Rhizoctonia solani. The term of the vegetation termination depends on the grover and must be in written documentation. The harvest alome can follow after the the drawal period in the desiccation resource, which uswally 15 days. The results indicale that whem the harvest of the potatoes is made at the proper time after the termination of the vegetation, the potato bulls are withhout any largen percentage accurence of the "flakiness". The results achieved during the years 2012 and 2013 indicate that in early implementation off all the working operations important for the potato growing, which begin with sorting out, followed by plantig, care, chemical sprays, selection, parades, desiccation and the harvest, the "flakiness" dinďt exceed 5% of the occurence. Another results indicate that the taken bulls were undamaged and the difference of the occurrence of the "flakiness"on each sample appeared in a variety of ways. The years of abseving the experiment proved that there was an increase in the "flakiness" on the surface for a given time period.