The effect of riser height in a fixed sprinkler irrigation system, irrigation interval, and addition of emulsified spent engine oil conditioner on soil moisture content and salt distribution in clay soil

A field experiment was conducted to study the effect of sprinkle riser height in a fixed sprinkler irrigation system at three height treatments 1m (h₁), 1.25m (h₂), and 1.5m (h₃) and two irrigation intervals 5 days (I₅) and 9 days (I₉) calculated from a US pan Class- A-, using an emulsified Spent engine oil conditioner at 0.3% w/w (O₁), in addition to a control treatment (Oc), on some properties of clay soil represented by moisture content and salt distribution in the soil profile. The results showed a significant superiority of sprinkler riser height h₁ in achieving the highest values of moisture content (PW%) and the lowest values of electrical conductivity (EC) (dS m⁻¹) compared to the two heights h₂ and h₃. Irrigation interval I₅ was achieved the highest PW% values and the lowest EC values compared to irrigation interval I₉, with a significant difference. While, the addition of emulsified Oil conditioner treatment (O₁) achieved the highest PW% values and the lowest EC values compared to the control treatment.