Analysis Effect of Biological Recovery Activities on Physio- Chemical Properties of the Sandy Lands of Dejgah Watershed, Fars Province

One of the biological methods to sand dune stabilization and reclamation of desert, is planting the resistant species inbare anddry lands. Considering the importance of biological recovery plans, this study was carried out to investigate the effect of planting of Prosopis juliflora species on physical and chemical properties of soil. For this purpose, three sites were selected: control, sub-canopy and between- canopy site. The results of this study showed that the effect of planting Prosopis juliflora species on physicochemical properties of soil is significant. The maximum amount of organic materialwas related to the sub-canopy site (5.22%), the highest amount of Cationic exchange capacity and pH were related to the sub-canopy site (98.75%), sub- canopy site (1.34 dS/m) andcontrol site (10.38). Soil texture results indicated soil texture change from fine sand in the control site to sandy clay loam in the between- canopy site and loam in the subcanopy site. The overall results of this research indicate that the implementation of biological operations through the planting of Prosopis juliflora species plays an important role in improving soil characteristics and controlling wind erosion.