WATER-VAPOR ADSORPTION AS RELATED TO LIMING OF ACIDIC SANDY FOREST SOIL

Water vapor adsorption isotherms were measured for soil samples taken from five subsequent 10 cm layers of limed and unlimed Cambic Arenosol under forest, Applying the numerical approximation of adsorption isot herms with an exponential isotherm equation and a local BET model. the surface areas, average adsorption energies and adsorption energies di stribution functions were calculated. The values of average adsorption energies increased slightly with the depth of the layer, however no m arked differences were observed between the average energies for the e quivalent layers of both limed and unlimed profiles. For unlimed profi les the energy distribution functions possessed two maxima, the smalle r maximum. however, disappeared in limed profile.