Question

Which one of the following soil type - steady state infiltration rate combination is incorrect?

• A. Sands - $>$ 20 mm hr$^{-1}$
• B. Loams - 5-10 mm hr$^{-1}$
• C. Clayey soils - 1.5 mm hr$^{-1}$
• D. Sodic clayey soils - $>$ 20 mm hr$^{-1}$

Hint:

Remember that ______Sodium ($\text{Na}^+$)______ is a highly dispersing agent that ruins soil structure.
Any soil described as ______sodic______ or ______alkali______ will have an extremely low hydraulic conductivity and a near-zero infiltration rate.

Answer 1

The Correct Option is D