Fractal dimension of peat soils from adsorption and from water retention experiments

Samples of peat soils characterized by different degree of the secondary transformation are studied by means of nitrogen and water vapor sorption. Moreover, we have also determined the water retention curves and the dependence of the hydraulic conductivity on water potential. The experimental data are interpreted in terms of fractal theories of adsorption and retention, yielding the values of the corresponding fractal dimensions. We discuss the relation between surface fractal dimensions obtained from nitrogen and water sorption data, as well as between the mass fractal dimension resulting from retention data. We have also tried to correlate the fractal dimensions to other physico-chemical properties of investigated soils.