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Senzorické vlastnosti sladiny
Piechová, Hana
Beer foaminess is one of the main sensory properties of beer. Polypeptides have a positive effect on foam formation, while lipids have a negative effect. The wort contains both types of substances, but it does not foam by itself due to a lack of carbon dioxide. The aim of the thesis is to find out whether there is any influence of a particular variety and year on the foaminess of the wort. 14 varieties of spring malting barley were monitored at nine locations from the harvest between the years 2020 and 2022. The foaming of the wort was measured on a 1-CUBE type FA device at the Research Institute of Brewing and Malting (Výzkumný ústav pivovarský a sladařský, a. s.). The found foaminess values of the wort were clearly influenced by 30% by year and by 33% by variety. What is statistically significant is that the lowest foaming rate of the varieties was found in the 2020 harvest. The average stability of the wort foaming was 170 s and for individual varieties it ranged from 111–220 s. The statistically significantly lowest foaming stability of the wort was observed in the Overture and KWS Amadora varieties, the highest values of the wort foaming were found in the LG Ester and Spitfire varieties. The KWS Amadora variety showed the greatest foaming variability (70%), the LG Stamgast showed the lowest variability (18.5%). The foaminess of the wort can potentially predict the foaminess of beer.
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Economical efficiency of selected crops growing in conventional and organic farming system - case study
POKORNÁ, Kamila
The diploma thesis focused the economic efficiency of growing oat and spring barley in a conventional and organic farming system during 2018 to 2022. The thesis is divided into two parts, the literary part and the practical part. The literary part describes economic efficiency, agriculture, agricultural subsidies and selected crops. The practical part includes calculating the profitability of crops in both systems. The basic rate of profitability was determined based on the revenues, purchase prices and costs of each business. In the end, financial support in the form of subsidies to which the selected companies are entitled are added to the calculation of profitability. In addition to the calculation itself, the thesis includes the causes of the resulting difference in efficiency between the two systems.
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Rozdíly v zaplevelení širokořádkových a úzkořádkových plodin
Kubínek, Marek
The task of this bachelor's thesis was evaluate weeds and evaluate the differences in weeding of narrow-row and wide-row crops. The evaluation took place on the land of AGROPOD Podolí a.s. and at the private farmer Ing. František Kubínek. Weeds were observed per 1 m2 in winter wheat, spring barley, maize and annual sunflower. The results were statistically evaluated using canonical correspondence analysis (CCA). In narrowrow crops, weeds were recorded mainly from the families Asteraceae, Chenopodiaceae, Convolvulaceae and Violaceae. These species were mainly creeping thistle (Cirsium arvense), white goosefoot (Chenopodium album), wild buckwheat (Fallopia convolvulus), field pansy (Viola arvensis) and others. Weed species of the families Chenopodiaceae, Asteraceae Asteraceae and Convolvulaceae have been found in broadleaved crops. The most common were white goosefoot (Chenopodium album), creeping thistle (Cirsium arvense), wild buckwheat (Fallopia convolvulus) and others.
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