In a "Single Tree Selection" management system an uneven aged stand of trees is the objective. Only some trees of each age category are removed. Sawlogs are harvested on a fifteen to twenty year cycle with an eye to preserve natural habitat for plants and animals. Potential crop trees are released from competition and disease pressure is reduced as tree tops and unacceptable growing stock are cut and removed from the forest floor as firewood. This opens the forest for regeneration of shade intolerant species such as oak and cherry. A percentage of large, mature, genetically superior trees are left for seed production.