|
| |
|
|
Land grabbing and land prices since 1989
MELMEROVÁ, Anna
The bachelor's thesis is focused on mapping the decrease of agricultural and especially arable land in the Czech Republic since 1989, examining the changeover of agricultural land to built-up areas, mapping the development of charges for land grabbing, evaluation of legislative conditions for the land grabbing and evaluation of opportunities to affect the land grabbing by the administration. Two hypotheses have been formulated: 1. Construction is carried out mainly at the expense of arable land - data analysis of the conversion of arable land confirmed this hypothesis. 2. Increased charges for the land grabbing in 2011 have had an effect on soil loss - comparison charges for the land grabbing with the loss of agricultural land did not confirm this hypothesis.
|
|
|
Spontaneous restoration of wetlands on arable land.
VITTEK, Petr
Spontaneous restoration of wetlands on arable land was observed in the part of South Bohemia. The main aim of the study was to describe colonization of the newly formed wetlands by plants in relation to character of the site and its surroundings (age and size of the wetland, distance to the field margin and to a nearest permanent wetland). Data were collected during three seasons (2011, 2012 and 2013) and analyzed using linear regression and ordination analyses (DCA, CCA). There were found no significant effects of the distance from the permanent wetland and the distance to the edge of the field on species composition of the newly created wetlands, only some trends were obvious. The effect of successional age of wetlands on their species composition was significant. In general, it was shown that spontaneous restoration of wetlands on arable land is possible.
|
|
| |
|
|
Occurrence of mercury in the soil around upper stream Ohře
MILLER, Zbyněk
The aim of this study was to summarize information about the behavior of mercury in soils, particularly the assessment of its mobility and bioavailability, and to verify the extent of contamination of alluvial soils under the reservoir Skalka. This research was aimed to evaluate the contamination of mercury floodplain soils with mercury belong the upper river Ohře near the town of Chvoječná, near 230th river kilometer. River sediments of the upper river Ohře and the surrounding alluvial soils in floodplains contain high mercury levels. The site has been sampled for mercury analysis of soil samples taken from farmed areas, which are expected enrichment of mercury deposits of the inserted river Ohře. There were two main types of land-use, permanent grassland and arable land. The observed results can be concluded that the river floodplain sediments enrich the soil with mercury. Analytical method (atomic absorption spectrometry, CV-AAS) showed that almost all surface soil samples from the flooded area exceeds the maximum allowed value (for light soils 0.6 mg.kg-1 and other land 0.8 mg.kg-1 ) that are designated for agricultural land. Indicative of mercury was determined by mobility, which was up to 2.18%. Levels of organic forms of mercury were also measured in the soils that reached the area of grassland 2 maximum 0.147 mg.kg-1; the subsidiary surface S1 had the relative distribution of organic mercury 10.98% at a depth of 101-140 cm.
|
guest ::
