No description available.

This thesis investigates the trend of cassava production and assesses the importance of the crop to livelihoods of Nigerians. Using qualitative analysis of secondary information obtained from reliable domestic and international organizations, the findings show that cassava serves as a major source of income and food for rural farmers, as well as people living in urban communities. Nonetheless, the study further shows that the industry is constantly bedevilled by problems ranging from soil infertility to poor quality of planting materials, as well as pests and diseases. These issues put a serious question mark on the future integrity of the country as the leading producer of the crop. By implication, cassava production, though ascending in terms of productivity and yield, yet, its future is precarious and unpredictable. Among the recommendations include, dealing with the spread of pests and diseases through careful selections amongst farm improved planting materials and conscious education for local farmers

The thesis titled Factors influencing the energy and performance parameters of machine lines for soil cultivation in the theoretical part contains a research about current situation in the construction tractors. The research focuses on the structurally most important parts of tractors (motors and gearboxes) and further discusses the selected components. In the practical part there is described a measurement under field conditions with selected machine line for soil cultivation. Field measurement were carried out on the estates of Cooperative Farm Hodíškov, ploughing machine line consisted of Case Puma 210 tractor with a Lemken Diamant plough. During the measurements tractor was working in two modes of engine load (from 1700 to 1900 rpm and from 1900 to 2100 rpm), the energy and performance parameters were examined for each measurement. The lowest fuel consumption and highest efficiency was achieved while working in the economic speed range from 1700 to 1900 rpm.

Práce mapuje vznik a vývoj koncepce trvale udržitelného rozvoje a uvádí různé přístupy k definici pojmu trvale udržitelný rozvoj. Dále se zaměřuje na analýzu a aplikaci ukazatele ekologické stopa. Na základě analýzy ekologické stopy hledá možnosti zapojení jednotlivce do snahy o udržitelný rozvoj (udržitelná spotřeba). Na závěr uvádí možné scénáře budoucího vývoje.

Presented diploma thesis is focused on the specification of the competitiveness of Czech producers on the European market of poultry meat. It deals with the development of production and the overall balance of the commodity on the Czech market. It identifies the key factors specifying the effectiveness of Czech producers in the market and compares its level with selected countries of the European Union. On the Czech market it analyzes the basic factors of supply and demand, consumption and balance of poultry meat, the price trend in all stages of verticals, ie agricultural producer prices, industrial producer prices and consumer prices and foreign trade. On the basis of analysis parameters and results of two selected Czech companies which are engaged in rearing poultry processing of basic raw materials and then selling a chicken, it will be considered the final consumer. It also monitors competitiveness.

This thesis deals with the technical and economic evaluation of tractor transport kits. The first part is indicated the current situation in construction of tractors and there is, more detailed description of structural elements of tractors NewHolland T7050 PowerCommand and AutoCommand. In the second part there is the methodology of laboratory measurements and their subsequent evaluation. The third part deals with the field measurements, where is described the detailed profile of the test track and measurement methodology. At the end the measured data were given into the tabular and graphical form and finally evaluated. The evaluation of the data shows that the transmission is suitable for transports. The thesis came to the conclusion about which kit had the best results according the conditions.

Farm tractors are used in various works that is the reason why manufacturers equip the tractors with engines with outputs from 30 to 450 kW, mechanical or hydro mechanical gearboxes and tires with various acceptable inflation pressures and dimensions. Many types of tires which are available for agricultural tractors, places higher requests on the knowledge of the transfer of power from the tires on a surface. What is the impact of different design of tires transmission on output power or fuel consumption can be determined, for example, make a field measurements. Results of field measurement shows that tire inflation and type of tires has significant effect on pull performance slip and fuel consumption.

This diploma thesis deals with evaluation of level and evolution of food consumption in Czech Republic in last twenty five years. It characterizes fundamental evolution trends in food consumption in wider socioeconomic context. It analyzes development of food consumption in terms of price-consumption interaction and also in terms of income-consumption interaction. It describes changes of business environment with emphasis on final stages of vertical food chains. It also describes structural changes in retail network and growth of market power of multinational retail chain on Czech market. This paper also determines factors, that influences consumer behavior while buying food products and describes new trends of food consumption.

Diploma thesis describes current fuels for gasoline engines in theoretical part. It de-scribes conventional fuels: gasoline, gaseous biofuels and liquid biofuels. This section talks about: familiarization with manufacturing, raw materials for production with their pros and cons. Fuels are comparing with one another in the tables. In a separate chapter is more about biofuel ethanol, which were measured in the practical part. The practical part describes the motor testing, dynamometer and engine on which measurements were made. On the engine we compared the effects of fuel (N95, E70 and E32) to power and torque, fuel consumption, exhaust gas temperature, engine effi-ciency and the energy supplied in the fuel. The results of monitored parameters are listed in tables and compared in graphs. The results show that ethanol has a positive effect on performance and engine torque. The negative impact of ethanol in the fuel is increased fuel consumption.

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.