The oak flourishes best on a strong loamy soil, rather moist than dry. Here at least the growth is most rapid, although, for timber, the wood is generally not so sound on a moist soil as a dry one, and the tree goes to decay more rapidly. Among the American kinds, however, some may be found adapted to every soil and situation, though those species which grow on upland soils, in stony, clayey, or loamy bottoms, attain the greatest size and longevity. When immense trees are desired, the oak should either be transplanted very young, or, which is preferable, raised from the acorn sown where it is finally to remain. This is necessary on account of the very large tap roots of this genus of trees, which are either entirely destroyed or greatly injured by removal. Transplanting this genus of trees should be performed either early in autumn, as soon as the leaves fall or become brown, or in spring before the abundant rains commence.