Loam is the best type of soil to enrich a Central Texas lawn or garden. Because it contains roughly equal amounts of clay and sand, it holds moisture — but not too much.Top soil/chocolate loam also contains humus, the dark organic component of soil which is produced by the decomposition of plant and animal matter through composting.
The original gray or cream-colored soil beneath many lawns and farms in Central Texas is known as caliche. This soil type has formed over time as carbonates were dissolved and leached by rainwater. Because chocolate loam adds the nutrient value of humus, this provides a rich base which encourages deep rooting. Humus also helps our top soil/chocolate loam hold moisture, further stimulating plant growth.