Relative Influence of Sassafras, Black Locust, and Pines Upon Old-Field Soils

Restoration of forests on 75 to 80 percent of the area of abandoned fields in the central hardwood region usually cannot he done directly with desirable hardwoods because of soil deterioration from cultivation and erosion. A preliminary crop is necessary that can endure site dryness, lay down a litter cover, and thereby make possible the restoration of surface soil structure and water-absorbing capacity. Sassafras, black locust, and pines, three species commonly performing pioneer functions, have been studied as soil conditioners. The functions performed by each in soil rehabilitation and their respective roles in reforestation are discussed.