Physiochemical Behavior of Some Shura and Sabkha Soils Derived from Sedimentary Calcareous Soils

Abstract

This study was conducted in order to know the relationship of the time duration and amount of the water required for leaching Shura soil and  Sabakh soil with the view of comparing the two soils.To achieve this purpose, Shura soil was collected  during the commencement of the Agricultural Delmach project in Wasit city / AL-Ahrar region, and  Sabakh soil during the final stages of the same project above with depth of ( 0 - 30 )cm. The two soils were leached using drain water (EC 3.7 dsm^-1) and distilled water as a control unit using  Miscible Displacement method, then the soils were leached for ten times durations, each one lasting (15 min.), thus the total time  of duration is (150 min.), every time stage determined by extracting the p^H and EC.Results showed : the duration (150)min and the required  amount of water ( 150 ml  ) for leaching Shura soil to decrease EC under 4 dsm^-1 compared with Sabakh soil which require amount of water (60 ml ) with time stage ( 60 ) min for decreasing EC under 4 dsm^-1 with significantly different between the two soils ( L.S.D/0.05). And p^H decreased at every time stage with the decrease of EC until it reached the  stable stage pertaining to the final time stages of the leaching operation .

Key words: Shura ,Sabkha ,Calcareos soil ,Miscible displacement ,Drain water .