Recently, various organic amendments such as mulch, manures and composts, have been investigated for their effectiveness in soil remediation. It has been demonstrated that the application of organic matter to saline soils can accelerate NaC leaching, decrease the exchangeable sodium percentage and electrical conductivity and increase water infiltration, water-holding capacity and aggregate stability (El-Shakweer et al., 1998). Furthermore, the application of organic matter increases soil microbial biomass and some soil enzymatic activities such as urease, alkaline phosphatase and b-glucosidase (Blagodatsky and Richter, 1998; Liang et al., 2003).