Question
So how do we amend our NC red clay for the lawn without tearing the whole thing up?  My front yard is full of weeds and want to plug some zoysia.  Thanks!

Answer
I would Spray Round- up on the weeds when the temps are warm, It should take 2 -3 weeks for a good kill.

Clay Soils
   * Cannot dig easily when wet or dry
   * Cannot cultivate while wet, at the risk of extreme compaction
   * Soil is sticky
   * Low risk of erosion

The best soil feels like pie crust before rolling it out when you push it between your thumb and your hand.  If your soil feels out of balance-too much clay or sand, the best way to improve it is to add organic matter.  Organic matter to soil is like spinach to people:  it cures almost all soil ailments.  Organic matter improves drainage, and water retention.  Healthy lawns start with healthy soil.  Understanding different types of soil classification can help with soil conservation efforts and overall lawn care.