Certain soils are compacted easily, especially in areas of heavy foot traffic. This condition prevents adequate gas exchange, penetration of moisture and nutrients, and restricts root growth. Aerification corrects this condition. Circular spots 8 to 10 inches in diameter may appear in areas frequented by female dogs. Heavy watering helps dilute the salt concentration and corrects this condition.
Commercial fertilizers are salts and can burn turfgrass when applied excessively.
This condition is most often seen where fertilizers are spilled. Most lawn grasses require full sunlight. When a lawn is fertilized, this in turn stimulates growth of shrubs and tress that shade turfgrass. Selective pruning of trees and shrubs helps correct this condition. St. Augustinegrass and tall fescue are somewhat more shade tolerant than other turf types.