The farm wood-lot, too, is often neglected. As forests are being swept away, fuel is of course becoming scarcer and more costly. Every farmer ought to plant trees enough on his waste land to make sure of a constant supply of fuel. The land saved for the wood-lot should be selected from land unfit for cultivation. Steep hillsides, rocky slopes, ravines, banks of streams--these can, without much expense or labor, be set in trees and insure a never-ending fuel supply. [Illustration: FIG. 222. WOOD LOT Before proper treatment] The most common enemies of the forest crop are: First, forest fires. The waste from forest fires in the United States is most startling. Many of these fires are the result of carelessness or ignorance. Most of the states have made or are now making laws to prevent and to control such fires. Second, fungous diseases. The timber loss from these diseases is exceedingly great. Third, insects of many kinds prey on the trees. Some strip all the leaves from the branches. Others bore into the roots, trunk, or branches. Some lead to a slow death; others are more quickly fatal. Fourth, improper grazing. Turning animals into young woods may lead to serious loss. The animals frequently ruin young trees by eating all the foliage. Hogs often unearth and consume most of the seeds needed for a good growth. [Illustration: FIG. 223. WOOD LOT After proper treatment] The handling of forests is a business just as the growing of corn is a business. In old forests, dead and dying trees should be cut. Trees that occupy space and yet have little commercial value should give way to more valuable trees. A quick-growing tree, if it is equally desirable, should be preferred to a slow grower. An even distribution of the trees should be secured. In all there are about five hundred species of trees which are natives of the United States. Probably not over seventy of these are desirable for forests. In selecting trees to plant or to allow to grow from their own seeding, pick those that make a quick growth, that have a steady market value, and that suit the soil, the place of growth, and the climate. SECTION L. THE FARM GARDEN Every farmer needs a garden in which to grow not only vegetables but small fruits for the home table. The garden should always be within convenient distance of the farmhouse. If possible, the spot selected should have a soil of mixed loam and clay. Every foot of soil in the garden should be made rich and mellow by manure and cultivation. The worst soils for the home garden are light, sandy soils, or stiff, clayey soils; but any soil, by judicious and intelligent culture, can be made suitable.