It helps improve drainage in your lawn clay, encourages deeper rooting, frees up nutrients and water in the root zone and helps move organic matter deeper into the soil. By improving clay conditions you can create a much healthier lawn in a more bioactive soil.
Compacted and clay soils result in unhealthy and shallow-rooted lawns and plants. There is no way to till in organic matter into and below the root zone without .
How to Improve a Clay Soil Lawn. Test the soil. A soil test determines the fertility of the soil by measuring the amount of nitrogen, phosphorus, potassium and other nutrients that are in the soil. Aerate the soil. Top-dress the lawn. Till the soil. Install a drainage system. Overseed in the fall. Feed the grass. Stay.
Wait until the soil has had time to dry. An easier method, if possible for you, is to simply apply 6 inches of quality topsoil over your existing clay soil and plant your lawn in that. Be sure you prepare and level the site before planting.
There are also other reasons for removing the top layer to improve clay soil. Home builders are. Below are some of the disadvantages of clay soils. Clay soil
A lawn with clay soil is heavy and compact when it's wet. It can absorb and trap water for extended periods, making it difficult for grass to become established.