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Dynamika půdního stavu během vegetačního období
Trnka, Tomáš
The bachelor thesis focuses on the dynamics of the soil condition of the land during growing season. The object of the study was a cambium in the cadastral area of Šeborov (district Žďár nad Sázavou). In this work we assessed selected soil properties. The stability of soil aggregates, bulk density, porosity, maximum capillary water capacity, minimum air capacity, soil moisture, soil reactions and organic carbon content were evaluated. The stability of soil aggregates showed statistically significant differences, as did moisture. The agroecological limits were not exceeded for bulk density or porosity during the entire vegetation period. Maximum capillary capacity values ranged from 20 % to 30 % during the growing season. The values of the minimum air capacity exceeded a satisfactory value of 15–20 % for almost the entire vegetation period. The active soil reaction was evaluated in the range for weakly acidic soil and the exchange soil reaction for acidic soil.
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Comparison of plowing and no-till tillage
DOLEJŠÍ, Přemysl
This final thesis deals with the comparison of plowing and non-plowing soil tillage. It is divided into theoretical and practical part. The theoretical part describes soil properties and importance of soil cultivation. Following is a presentation and description of selected technologies of soil cultivation. The practical part presents the measurement results. It was investigated whether this or that technology was more cost-effective and how different processing would affect soil compaction. The results are presented for the sake of clarity through tables and graphs.
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Environmental aspects of wastewater treatment and reuse in nature based technologies
Šereš, Michal ; Cajthaml, Tomáš (advisor) ; Uhlík, Ondřej (referee) ; Hanč, Aleš (referee)
In recent years, the issue of appropriate and efficient approaches to wastewater management and its potential reuse has become increasingly important in view of the geographical conditions of Central Europe, where, until recently, the problems associated with climate change and drought may not have seemed so pressing at first sight. Increasingly, so-called nature-based water management solutions, which help to both clean the water and retain it in the landscape, are being proposed. In drier, especially arid areas, this topic has been under discussion for many years and several examples of larger-scale applications are available. In the Czech Republic, on the other hand, mainly pilot applications only have been considered to date. However, the potential of nature-based solutions such as constructed wetlands, denitrification bioreactors, artificial wetlands and so-called reed bed units, is considerable. The advantages lie mainly in the robustness of these systems and their ability to mimic and intensify the natural water purification processes that occur in nature. They can be applied to waters contaminated with common fecal pollution or with higher nutrient content, as well as to waters contaminated with various types of micropollutants such as pharmaceuticals, hormonally-active substances and...
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Soil characteristics in relation to relief and land use around Sfinta Elena village in Banat, Romania
Zamazalová, Kateřina ; Chuman, Tomáš (advisor) ; Šefrna, Luděk (referee)
The thesis characterizes soils of the karst platform around Sf. Elena village established by Czech colonists in Romanian Banat. The emphasis is given to the relationships among soil chemical properties and different land use and relief. In the area, occurrence and distribution of soil types was mapped. The relief was found out to be the dominant factor determining soil chemical properties. It affects also the vegetation and land use. Among the different land use types the statistically significant difference was found mainly in organic carbon content, which is the main determinant of sorption capacity. Less favourable properties were found on arable land, where the low nutrient content was observed, too. It gives evidence of a depletion of the soil by farming.
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Development of methods for fast soil analysis
Křivánková, Zuzana ; Doležalová Weissmannová, Helena (referee) ; Kučerík, Jiří (advisor)
The submitted diploma thesis aims to extend the use of thermogravimetry for the analysis of organic C and total N contents in soils. The advantages of thermogravimetry in comparison to conventional analytical methods are that it is a versatile technique that provides fast analysis, does not require sample pretreatment and chemicals– and can be used for the analysis of various soil types. The research work performed so far showed correlations between thermogravimetric data and some soil properties. In the past, intact soils exposed to 76% relative humidity (RH) were analyzed by thermogravimetry for these purposes. However, this humidity is problematic to achieve and maintain for most thermogravimeters. Recent work has shown that correlations can be observed in agricultural land exposed to lower RH. Therefore, it can be assumed that a correlation between TG data exists in soils exposed to any RH. TG could then be used to analyze soil properties under any known RH conditions. The aim of this work was to verify this hypothesis and try to incorporate knowledge of RH into the relationships between TG and soil properties. For this reason, intact soils exposed to the relative humidity of 30, 55, and 76% were analyzed in this work. It was demonstrated the dependence between organic C content and mass loss between 320 and 330°C as well as total nitrogen content and mass loss between 410 and 420°C independently of relative humidity. Based on that knowledge, we have derived equations enabling determination of the content of organic C and total N for RH ranging 43% - 76% using mass losses and knowledge of RH. Nevertheless, due to the low number of tested RH, the equations are still only preliminary and need to be improved by analyzing soil samples at a larger number of RH.
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Soil characteristics in relation to relief and land use around Sfinta Elena village in Banat, Romania
Zamazalová, Kateřina ; Chuman, Tomáš (advisor) ; Šefrna, Luděk (referee)
The thesis characterizes soils of the karst platform around Sf. Elena village established by Czech colonists in Romanian Banat. The emphasis is given to the relationships among soil chemical properties and different land use and relief. In the area, occurrence and distribution of soil types was mapped. The relief was found out to be the dominant factor determining soil chemical properties. It affects also the vegetation and land use. Among the different land use types the statistically significant difference was found mainly in organic carbon content, which is the main determinant of sorption capacity. Less favourable properties were found on arable land, where the low nutrient content was observed, too. It gives evidence of a depletion of the soil by farming.
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