The current trend toward the establishment and care of forests for a wide combination of uses requires flexibility in forest culture and a knowledge of the silvicultural choices available to the resource manager. This publication summarizes the silvicultural systems that appear biologically feasible, on the basis of present knowledge, for each of 48 major forest types in the United States. Supporting information is given on the occurrence of the 48 forest types, the cultural requirements of the component species, and the biological factors that control the choice of silvicultural options.