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Bigots Curve for the Determination of Plastic Body Properties
Suk, Vojtěch ; Nevřivová, Lenka (referee) ; Sokolář, Radomír (advisor)
This bachelor thesis is focused on the use of the Bigot curve as a tool for assessing the performance of plastic ceramic materials. The theoretical thesis is a form of research of available literature. It elaborates a general view on the Bigot curve and possible application properties which derive from it for some specific soil. In the experimental part were determined properties of plastic ceramic material from location Jirčany from which were formed samples made of plastic dough with different moisture content, with the addition of grog and additives. Properties such as shape of Bigot curve, critical moisture value, size of drying shrinkage and drying sensitivity of the soil were monitored on the samples.
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Study of possibilities of hydrofobization of masonry clay blocks for plinth walls
Jirásková, Iveta ; Horský, Antonín (referee) ; Zach, Jiří (advisor)
The work is focused on the design method of hydrophobic cavity brick fittings for the construction of masonry structures, especially plinth masonry and other external structures subjected to elevated moisture. The scope of work is to undertake a literature review of hydrophobic products and methods for reducing absorption of masonry blocks. The work is also practical verification of the effectiveness of selected hydrofobics the brick fittings. The target is to find the optimal method of reducing the absorption of masonry elements, both in terms of the resulting utility properties and economic viewpoint.
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The quality of food wheat in South Bohemia
MACHOVCOVÁ, Dana
The quality of food wheat is annually evaluated with all deliveries of agricultural primary production in the chosen farming enterprise. During the years 2008 - 2012 particular characteristics with files of 42 - 222 samples were determined, except for the year of 2009 when only one supply was technologically incorporated to food wheat. Countrywide observation of the quality of food wheat is executed in Agricultural research institute Kroměříž, Ltd and in Agrotest fyto, Ltd. It is co-financed by Ministry of Agriculture within a functional task which follows the project of Ministry of Agriculture number QG50041 Factors of quality and safety with food grains (2005-2010). Harvest samples, obtained from producers in time span 2008-2012, were represented by files of 500-1035 samples. Characteristics which influence the quality of the grains as well as criteria and methods of the evaluation of food wheat were described. Their applications in Agrotest fyto, Ltd and under operating conditions in ZZN Pelhřimov a.s. were given. Average values of observed parameters were calculated from the results of each testing in the laboratory of the detached post Záhoří and consequently compared with countrywide norm and the norm of South Bohemia. The quality of food wheat grains in years 2008-2012 showed a large-scale variability in particular parameters both at countrywide level and in South Bohemia as well as in chosen farming enterprise. Final quality was considerably influenced by course of weather annually.
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The quality of barley for food and feeding
KADLECOVÁ, Helena
By the purchasing of malting barley and fodder barley from collective farms, companies, smaller enterprises and also independently farming farmers the quality is evaluated by indicators which are determined by valid standards. A range of factors participating in resulting grain quality. The quality criterions and laboratory methods were created in order to specify the quality of barley in the company laboratory ZZN Pelhřimov. Average values of the results of analysis of malting barley in years 2008 - 2012 were compared wiht the national average which its yearly evaluated by ČÚPS in Brno. In addition to the genetical base the malting quality is mostly influenced by the sequence weather in individual years.
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The comparison of winter and spring wheat quality
UHLÍKOVÁ, Jindřiška
The theme of this Bachelor's thesis is to compare the grain quality of winter and spring wheat varieties. There were a total of 16 selected varieties, 12 of winter- and 4 of spring. The experiment was conducted on the grounds of the South Bohemian University in Ceske Budejovice. The botanic characterization of wheat, the chemist of wheat grain and the quality parameters used for examination are mentioned in the introductury part . The first part of the experiment was focused on the control during the growth, the second part documents the analysis of examined samples (mass per hectolitre, N-substances, gluten, Zeleny test, falling number).
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Rating combine harvesters John Deere 9880 and New Holland CR 9080 at harvest of cereals and oilseed rape.
WEBER, Michal
The aim of this thesis was to compare the activity and quality of work of the combine harvester New Holland CR 9080 and John Deere 9880 STS at harvest of cereals and oilseed rape and their simple economic evaluation. The thesis was focused on comparing losses and influence of moisture of harvested crops on the size of the losses, on the quality of crushing and the spreading of plant residues. Then the inf luence of moisture of harvested crops on the quality of crushing and the spreading of plant residues, analysis of performance and consumption of diesel were compared.
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The quality of wheat for food and feeding
MACHOVCOVÁ, Dana
The quality of wheat meant both for food industry and for feeding is evaluated with all deliveries from co-operative farms, concerns and private farmers every year. Factors which can influence quality of grain, criteria for evaluation of the wheat grain quality, their practical use in working conditions of the concern ZZN Pelhřimov (former Grana, a.s.) detached post Záhoří and results of accomplished tests compared with statewide average were described. Average values of the wheat in 2007 - 2010 demonstrated variability in each characteristics both in the chosen concern and in statewide average. Weather conditions influenced the quality of most parameters. Considerable difference in the quality of grain could be found with particular distributors. The proper agricultural engineering and good seed corn are essential preconditions of first-rate production.
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Arbuscular mycorrhizal symbiosis of herbaceous invasive neophytes in the Czech Republic
ŠTAJEROVÁ, Kateřina
I have studied arbuscular mycorrhizal symbiosis of 44 herbaceous invasive neophytes occuring in the Czech Republic. My results show that about 70% of the examined species are capable to form symbiotic association with arbuscular mycorrhizal fungi (AMF) in the field. To my knowledge, mycorrhizal status of 23 invasive species is reported here for the first time. I predicted, based on the hypothesis of Urcelay & Díaz (2003), that the intensity of AMF in the roots of invasive species will be correlated with that of the native dominant species of invaded plant community, but collected data did not support this hypothesis. In addition, the effects of habitat and community characteristics on the intensity of AMF colonization of the invasive species{\crq} roots were tested. My results show that, at the within-species level, plants in the habitats with higher light and temperature conditions have less colonized roots whereas intensity of mycorrhizal colonization increases with habitat moisture. At the among-species level, invasive species occurring in the habitats with elevated nitrogen availability have higher mycorrhizal colonization of their roots. The effect of nitrogen availability is revealed at the among-species level and stays significant even after phylogenetic correction, suggesting this is an evolutionary adaptation rather than a phenotypic plasticity.
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