The character of soil cover in anthropogenically affected areas was determined on the basis of soil morphology, particle size distribution, soil chemical properties, soil organic matter properties and mineralogy of clay fraction. The degree of anthropogenic influence was variable in the individual soil profiles. This is probably the first time that data on hot-wate rextractable carbon distribution in soil profile were obtained from the territory of Prague., Anna Žigová, Martin Šťastný, Jana Krejčová and Pavel Hájek., and Obsahuje bibliografické odkazy
The study was performed in the territory of the Skryje-Týřovice Basin, in the Buchava Formation. The study area falls within the Křivoklátsko Protected Landscape Area. Samples were collected from Albic Luvisol. Parent material was characterized on the basis of thin section study. Soil development was evaluated by parameters such as macromorphological analysis, particle size distribution, pH, base saturation, cation exchange capacity, soil organic matter and mineral composition of clay fraction. Results of the analyses, especially the thickness of Bt horizon and distribution of clay fraction in the soil profile, confirm the process of intensive pedogenetic clay differentiation. Trioctahedral 1:1 regularly interstratified mineral (R=1) containing chlorite and smectite layers (low-charge corrensite) was described for the first time in the soils of the Czech Republic. Corrensite was detected in the Ah horizon of Albic Luvisol under weakly acid reaction conditions in the increasing amount of organic matter using the X-ray diffraction analysis. The distribution of clay minerals in Albic Luvisol showed that soil development is influenced by loess and also volcanic rocks in the lower part of the profile.
Hypnum sauteri and Lescuraea patens are reported new and Hypnum recurvatum confirmed for the bryoflora of the Czech Republic. The two Hypnum species have been discovered in the valley of Rudný potok brook, Lescuraea patens has so far been recorded at several microsites in the glacial cirques of Mt Kotel, Labský důl valley and Úpská jáma cirque (all localities in the Krkonoše Mts). Full details of the localities are described, the plants are illustrated, and their ecology, distribution and diagnostic characters are briefly discussed.
The research has dealt with mineral composition of the dislocation clays developed on the Prague fault. The Prague fault is a tectonic boundary between underlying clayey slates of Záhořany series and Skalka quartzite. The fault zone is filled with clay or sandy-silt to silty-sand matrix with scattered fragments of the surrounding rocks either slates or quart zite. Quartz, illite, kaolinite, chlorite, sporadic feldspar and gypsum were identified in powdered preparations by X-ray diffraction. The clay fraction of the taken samples is composed of illite, less kaolinite and sporadic chlorite and gypsum., Pavel Hájek and Martin Šťastný., and Obsahuje bibliografické odkazy