Soil repelling water
What makes soil repel water and how does one go about fixing it?
I'll apply the same amount of water at one end of a level border bed as at the other, but where the soil in one place becomes saturated, the soil in the other only looks wet on the surface while it's actually bone dry just under the surface. The only thing I know about the area is that it was tilled several years ago and at that time was mulched with compost. A gal at the garden center suggested adding peat or coconut coir but I'm hesitant to do anything until I know more about what is going on.
Any info or leads to info you can provide would be greatly appreciated.