UTILIZATION EFFICIENCY OF DIFFERENT INDUSTRIAL BYPRODUCTS IN AMELIORATION OF SALINE-SODIC SOILS

A field experiment was conducted during two successive years (2011/2012 and 2012/2013) in a clay saline soil located at South of El-Hussynia plain, Research Station ,Port-Said Governorate, Egypt. This study aims to evaluate the utilization efficiency of some industrial byproducts i.e. Sugar lime, vinasse, by-pass, pyrite (FeS2) and aluminum sulfate (Al2 (SO٤)318H2O) individual and interaction among them as a soil amendments and their effects on improving some chemical and physical properties of saline sodic soils, comparing with gypsum application, under Intermittent leaching technique was adopted using El-Salam canal water. The results showed that the chemical and physical properties of the studied soil were clearly improved due to amendments addition. The common parameters of saline sodic soil i.e., EC, pH, ESP, RSE, B.D, P.R, and WTD were clearly improved. The superior improvement of these parameters was resulted from T8, T9 andT7. The amendment can be arranged, ascending as follows: T1 T2 T10 T٦ T3 T٥ T٤ T11 T13 T12 T7 T9 T8 for both surface and subsurface layers. The final aim is to displace Na from an exchange complex and replace it with Ca, leading to a decrease of exchangeable sodium percentage (ESP) or increased removal sodium efficiency (RSE) consequently improvement of soil structure. An additional advantage to this strategy is that any mixture is inexpensive and ready available in large quantities in contrast to gypsum in this study.