Originally Posted by Kiril
Again .... no offense, but maybe you should follow your own advice. Clay soils can most certainly contain calcareous material, however you are correct that a Ultisol will most likely not be calcareous.
Further, clay soils are not "impermeable" and how do you know what amount and type of lime to use without a soil test?
When I spoke of it being impermeable, I was mainly speaking about water not being able to pass through it easily. I will have to agree to disagree on this.