The study looked at how different types of salts in irrigation water affect the quality of drainage water. They used soil columns to mimic real-life conditions and tested various irrigation water salinity levels. They found that drainage water salinity changed depending on the type of salts in the irrigation water and how much water was leached out. Soluble salts led to higher salinity levels, while salt load was higher with a 35% leaching fraction. Different ions like Cl, Ca, and Mg behaved differently in the soil profile, with some accumulating and others leaching out. Overall, the study showed that the quality of drainage water is influenced by the type of salts in the irrigation water and how much water is leached out.