Spatial Variability of Soil Texture in Selected Area of Alluvial Plain of Luznice

5 Summary Research part of this dissertation thesis begins with floodplain characteristics and describes concerned area in geographic, geologic, geomorphologic and pedologic connections. A chapter about nature conservation is included as all the area is situated in a natural reserve and protected landscape area. Next part of the dissertation describes characteristics of fluvisols and differences of insertion fluvisols in soil taxonomy systems. This part also involves a chapter dealing with questions of soil texture classification and particle size analysis. Materials and methods chapter contains field research and particle size analysis, in particualr pipette and sieve analysis and statistical survey of grain size data. Last part of the dissertation thesis presents field survey data which was complemented by data from VUMOP and ýVUT. Results of grain size analysis of twenty chosen samples are also included. Results of geostatistical data survey on concerned areas are depicted on maps which illustrate variation of soil texture. The end of this part summarizes a change proposal of environmental-soil unions' classification and rough calculation of retention capacity of the concerned area. Key words: fluvisol, floodplain, Lužnice, texture, retentio