[Illustration: FIG. 11. CLOVER IS A SOIL-IMPROVER] There are several things to be done in trying to reclaim worn-out land. One of the first of these is to till the land well. Many of you may have heard the story of the dying father who called his sons about him and whispered feebly, "There is great treasure hidden in the garden." The sons could hardly wait to bury their dead father before, thud, thud, thud, their picks were going in the garden. Day after day they dug; they dug deep; they dug wide. Not a foot of the crop-worn garden escaped the probing of the pick as the sons feverishly searched for the expected treasure. But no treasure was found. Their work seemed entirely useless. [Illustration: FIG. 12. INCREASING THE PRODUCTIVE POWER OF THE SOIL Second crop of cowpeas on old, abandoned land] "Let us not lose every whit of our labor; let us plant this pick-scarred garden," said the eldest. So the garden was planted. In the fall the hitherto neglected garden yielded a harvest so bountiful, so unexpected, that the meaning of their father's words dawned upon them. "Truly," they said, "a treasure was hidden there. Let us seek it in all our fields." The story applies as well to-day as it did when it was first told. Thorough culture of the soil, frequent and intelligent tillage--these are the foundations of soil-restoration. Along with good tillage must go crop-rotation and good drainage. A supply of organic matter will prevent heavy rains from washing the soil and carrying away plant food. Drainage will aid good tillage in allowing air to circulate between the soil particles and in arranging plant food so that plants can use it. But we must add humus, or vegetable matter, to the soil. You remember that the virgin soils contained a great deal of vegetable matter and plant food, but by the continuous growing of crops like wheat, corn, and cotton, and by constant shallow tillage, both humus and plant food have been used up. Consequently much of our cultivated soil to-day is hard and dead. There are three ways of adding humus and plant food to this lifeless land: the first way is to apply barnyard manure (to adopt this method means that livestock raising must be a part of all farming); the second way is to adopt rotation of crops, and frequently to plow under crops like clover and cowpeas; the third way is to apply commercial fertilizers. To summarize: if we want to make our soil better year by year, we must cultivate well, drain well, and in the most economical way add humus and plant food. =EXPERIMENT= Select a small area of ground at your home and divide it into four sections, as shown in the following sketch: On Section _A_ apply barnyard manure; on Section _B_ apply commercial fertilizers; on Section _C_ apply nothing, but till well; on Section _D_ apply nothing, and till very poorly.