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Using the Technology of Narrow Rows as an Anti-Erosion Measure in Corn Cultivation
Nevěčný, Karel ; Tomášek, Jaroslav (advisor) ; Cihlář, Pavel (referee)
Soil is a basic, limited and non-renewable natural resource. It is the natural wealth of each country. Therefore, soil erosion is a major problem not only in the Czech Republic, but also on a global scale. As a result of the erosion process, the stability of soil aggregates is broken; there appears loss of organic matter and nutrient transport, or land within the property or outside. These factors cause irreversible damage to soils, which ultimately has both environmental and economic impacts. As the wide-rows crops areas increase, including corn there increases even the interest of professionals and the public in that problem. At the present, there are searched new technologies of corn cultivation, which should help in elimination of risks associated with that crop cultivation.
The aim of this thesis was to analyze selected soil conservation technologies in corn crops in the company ZD Krasna Hora nad Vltavou in terms of their impact on aquatic soil erosion and biomass production. There were analyzed the technologies of tillage disc harrows soil processing, sowing directly into freezing-out crops and as a control a fallow was established. We have also analyzed two inter-rows spacing of vegetation establishment, namely 37,5 cm and 75 cm.
The results of this work show an evident positive effect of no-tillage technology of corn cultivation, whether in the narrow or wide rows that are particularly effective at the beginning of the growing season, which is the most problematic for corn. As for the yield of biomass is concerned, the highest yield of biomass was achieved in variants with the width of 75 cm and in technology of sowing into freezing-out crops.
The work also includes a literature review, which covers erosion, erosion control measures, corn and tillage systems. Special attention is paid to so-called soil-protection technologies, which are used primarily in wide-rows crops such as corn.
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Revitalization of small streams and small water reservoirs
OKROUHLÝ, Roman
Revitalization of watercourses and small water reservoirs are complex process that aims to restore the natural character of waterways and properties. Preparation and implementation of revitalization brings large number of problems. Problems need to be addressed by linking tools. These tools include legislation relevant laws, land use planning, flood politics, nature conservation, water management, fish farming, financial support for projects facilitate access to land affected by watercourses and improve public awareness. If these tools in a concerted manner, there would be no controversy, will result in improved water regime in the landscape and environmental improvement, which is the public interest.
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Archaeological tinned iron artefacts
Ottenwelter, Estelle ; Leroux, M. ; Děd, J.
Tinning of iron is a technique used since the second half of the 5 th century BC by ancient craftsmen. It was used as a decorative technique imitating silver, as a corrosion resistant barrier, as a suitable surface for soldering, and for its non-toxic properties. Usually badly preserved and hidden under iron corrosion products, it is though visible on X-radiography and can be identified by chemical analysis. Its conservation poses problems during mechanical cleaning and desalination treatments.
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Some notes about stone monuments current methods of cleaning
Gláser, Petr
This paper is dedicated to cleaning of stone monuments. Both technical and aesthetic point of view of the cleaning process are concerned and also the historic development in the conservation approach including various starting points, objectives and the social influence. The paper moreover describes recent procedures in monuments cleaning. It contains also an overview of the postulates of compatible conservation intervention (cleaning) and focuses on important issues that need to be responsibly solved.
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