Národní úložiště šedé literatury Nalezeno 4 záznamů.  Hledání trvalo 0.00 vteřin. 
Using the dye tracer for visualization of preferential flow in macro- and micro-scale
Kodešová, R. ; Němeček, K. ; Kodeš, V. ; Žigová, Anna
Study is focused on the visualization of the preferential flow in different soil types and their horizons using the dye tracer experiment. The field ponding dye infiltration experiments were performed in two soil types: Haplic Luvisol and Haplic Cambisol. In addition, the thin soil section were made and micromoprphological images were used to study soil aggregate structure and dye distribution in microscale. Images of the dye patterns (taken in macro- and micro-scales) documented very different nature of the preferential flow in different soil types and also within the soil profiles.
Mineral composition of agricultural soils developed on loess
Žigová, Anna ; Šťastný, Martin
The study is focused on the comparison of mineral composition of different soil types formed on loess. The soil types were classified according to the World reference base for soil resources. Samples were collected from individual soil horizons. Basic soil properties such as the particle-size distribution, pH values, CaCO3 contents, base saturation, cation exchange capacity, soil organic carbon and nitrogen were analysed using routine pedological methods. Mineral composition was evaluated on the basis of XRD analyses of the fraction < 0.001 mm. Semiquantitative mineral composition was calculated from the areas of basal peaks. The studied soils were found to be dominated by quartz, kaolinite and illite. Semiquantitative analyses of mineral composition of the Greyic Phaeozem, Haplic Chernozem and Haplic Luvisol revealed differences in the association and proportion of individual minerals.
Diverzita půd v CHKO Křivoklátsko
Žigová, Anna ; Šťastný, Martin ; Krejčová, J. ; Koptíková, Leona
Práce je výsledkem analýzy struktury půdního pokryvu v CHKO Křivoklátsko. Výsledky této analýzy umožnily v podstatné míře doplnit poznatky o půdních poměrech studované oblasti. Pro studium diverzity půd byla vybrána reprezentativní stanoviště odrážející typické přírodní poměry a zohledňující všechny půdotvorné faktory. Dominantními jsou půdy s diagnostickým Bv horizontem.

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