In this study, polyacrylamide (PAM) and gyttja applied to clayey and sandy soils caused by timedependent changes in some physical properties were investigated. For the purpose of the study, various dose combinations of gyttja and PAM were applied to soils by the oven dry weight basis. Study constructed according to a randomized complete block experimental design was carried out in plastic pots kept under greenhouse conditions. 4, 8 and 12 months after the experiment establishment, pots were deteriorated and necessary measurements realized. In order to assess the changes in physical properties of soils, coefficient of linear extensibility (COLE), liquid limit (LL), plastic limit (PL) and saturated hydraulic conductivity (Ksat) values were measured. According to ANOVA test results, effects of soil, application, and sampling time on measured all variables were found as significant (p < 0.001). While COLE values of soils decreased with rising application doses, Ksat, LL and PL values increased. When analyzing the time-dependent changes of these physical parameters, it was obtain a finding that Ksat, LL and PL decreased but COLE increased. According to Duncan test (α= 0.05) results, the most effective applications to decrease in COLE were first dose gyttja + PAM ([G1+PAM]) and second dose gyttja + PAM ([G2+PAM]) that there is no statistically difference between these. The most effective application to increase in LL was [G2+PAM] and the most effective applications to increase in PL and Ksat were G2, [G1+PAM] and [G2+PAM] that two applications was same, statistically. These results attributed to changes of organic matter content as time-depending in pots and argued and described frame of these changes. frame.
