Artikkelit kirjoittajalta Ryszard Oleszczuk
An analysis of the influence of shrinkage on water retention characteristics of fen peat-moorsh soil.
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The paper presents the results of laboratory-and field-measured soil moisture retention characteristics for different layers in peat-moorsh soil developed from a fen.Field de termination was based on the measurements of the moisture content and pressure head values performed on undisturbed soil columns during a drying process.Laboratory measurements were performed with sand table and pressure chambers.In order to ob tain moisture retention characteristics related to actual volumetric moisture content, the shrinkage characteristics were measured for different soil layers.The comparison of the laboratory and field measured moisture retention characteristics showed that the results of field measurements were very close to those of laboratory measurements, expressed in terms of fictitious volumetric moisture content.This expression of water content based on initial soil volume provides a better estimation of differential water capacity.
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Oleszczuk,
Department of Environmental Development and Land Improvement, Warsaw Agricultural University, ul. Nowoursynowska 166, 02-787 Warsaw, Poland
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