Abstract
Abstract Construction and operation of water mills had influenced the transformation of the relief and water conditions, as well as the soil cover around them. The study area includes the former Oleszek mill pond basin, located near the Borówno village, western part of the Chełmińskie Lakeland, about 20 km northeast of Toruń. The objective of the study was to determine the genesis of the soils developed from the Oleszek mill pond basin sediments. Five soil profiles were selected in the basin of the former mill pond, within the 550 m transect located along the Struga Rychnowska river. All of the analysed soils developed from the sediments filling the former mill pond basin. They have been developed as a result of a number of overlapping processes such as mud-forming, alluvial, colluvial and gleyic process. According to the Polish classification system (Classification of Polish Soils 2011) (CPS) two of the soils (profiles 3 and 4) derived from organo-mineral and organic materials are typical organic limnic soils. Systematic position of another two soils (2 and 5) was proposed as muddy soils. Due to the problems of classification of such soils, implementation of the muddy soils or muddy-gleyic soils subtypes (in Polish: gleby mułowate lub mułowato-glejowe) should be considered during developing of the next update of Classification of Polish Soils. These four profiles were classified as Histosols (profiles 3 and 4) and Gleysols (profiles 2 and 5) in WRB (2014). Pedons developed from alluvial materials (alluvial soils in CPS 2011 or Fluvic Phaeozems in WRB 2014) occurred in the proximal part of the basin.
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