The Appraisal use of Gypsum for Reclamation of Solin and Sodice Soils in Southern Khuzestan

Soil correction is one of the ways in agriculture lands development. The sodic ion alongside salin vocalizes the salin-sodic soil and cause divulge in plants growth. So necessary coure of action for the Soil correction by physical and chemical ways such as usage of calsium on the leaching is inevitable. In this study, area soils are digged from deep profiles of 0-20, 20-40, 40-60, 60-80 and 80-100 cm and samples were prepared for proceeds and analysis in the laboratory and calculated values of ECe, SAR, ESP, CEC and etc and chemical and physical properties was discussed. The test experiment method were conducted by randomized complete block design with two treatments (control, gypsum) and 3 replicate plots metal 1*1 m. Amount of water needed for leaching rate of 100 cm and 5 levels (each level was 20cm) were determined. After each step, the samples  were taken in the four set of determined depth and experiment was conducted. The study results and their statistical analysis show that gypsum material has not effect on the reduction of amendment SAR, ECe and ESP of soil. This can be due to the solving gypsum of soli as a result of water infilteration in the soil. It is recommended to improve saline and alkaline soils region to neutralize the effect of high sodium lands at least two preliminary rounds will be conducted with salt water (agricultural Drainage).