SOME CATIONSMOVEMENT IN CALCAREOUS SOIL COLUMNS UNDER EFFECT OF SALINE WATER MIXEDWITH HUMIC ACID

Abstract

Alaboratory experiment was conducted to study the impact of humic acid with different levels of saline water on the movement ofSodium, Calcium and Magnesium, and thekineticsof Sodiumadsorption ratio in calcareous soil with a texture clayloamusing the mixing displacement techniques. The soil was taken from the surface layer (0-30 cm),airdried and passed through a 2 mm diameter sieve. It was filled in columns of polyethylene. A fixed column of water was placed above the surface of the soil column of different salinity water (0.72, 3.00, 5.00 and 7.00 dSm-1), in accordance with humic acid levels of 0.00, 0.25 and 0.50 g L -1. The process of washing and collecting leachate continued daily. The amount of Sodium, Calcium and Magnesium in thewater filtered over time. The results showed that the amount of Sodiumreleased increases with the levelsof added humic acid and any levelsof saline water used. The amount of Calciumand Magnesiumreleased decreases with time and increases the added levels of the humic acid and any levelsof saline water used. Diffusion equation is the best equation described the movement of salt