Lincoln County ground is red clay, and red clay packs down hard under an Oklahoma summer until water runs off instead of soaking in. A1 Aerating works that problem from underneath, pulling cores in the damp window after a spring rain when the plugs come up whole and the soil is ready to take in air again. The yards out toward Agra and Tryon get read the way you'd read the ground beneath the post oaks — where it drains, where it stays tight, where the roots have quit going down. Overseeding follows the aeration so the new grass lands in ground that will actually hold it, and mowing keeps that growth honest as the weeks warm. By the time the heat settles over the Cross Timbers, the turf has somewhere deep to send its roots.