These negative effects, however, cannot be overcome by painting the field green or by overseeding with cool season grass. There is no conclusive research that shows that overseeding improves anything except color. Since the overseeding is made during early fall, it remains a weak seedling throughout fall play and does not improve traction or wear tolerance. In fact, some believe that it may make the field slick . After the ryegrass becomes more mature, during late fall or spring, the active ryegrass roots may decrease divot size.
Excessive moisture is a serious problem encountered when bermuda is dormant.
When the growth of bermuda stops during the fall season, the only drying that can occur is through normal evaporation. The evaporative loss is low during the short and often cloudy days of November. It is suspected that a fast growing cool-season grass can remove some moisture in the spring, but it would be minimal in the fall while the grasses are mere seedlings. In this respect however, overseeding may be most beneficial during spring play. Overseeding will also reduce the encroachment of winter annual weeds such as chickweed, henbit, and Poa annua.