The area underneath can then be leveled before replacing the sod. Topdressing Topdressing, the application of a light layer of soil to the surface of the turf, can also be used to smooth irregularities. The key to efficient topdressing is through repeated light applications of soil over an extended period. The texture of materials chosen for topdressing should closely resemble the texture of the underlying soil. No more than 0.25 in.
Irrigation is mandatory for consistent high quality turf.
Many turfs, while maintaining adequate cover under natural precipitation only, provide superior turf with supplemental irrigation. Turfgrasses such as Kentucky bluegrass may turn brown and go dormant in summer months without supplemental irrigation. This may serve as a weed control mechanism. Summer annuals may heavily invade turfs under only moderate maintenance, however, dormant turfs will not support crabgrass germination and development. These grasses generally recover and return to normal levels of quality in cooler weather.