Elementary agriculture with practical arithmetic elementaryagricu01hatc Year: 1906 THE CROP 71 onto the land and plowed under to enrich the soil. It is now in good shape for a second crop of tobacco. Now let us see what has been done: A five year's rotation has been planned, consisting of tobacco, oats, clover, corn and peas, returning to tobacco again the sixth year. During that five years it has been neces- sary to manure this piece of land but once. During two years legumes have been grown and plowed under VARIOUS ROOT SYSTEMS. T—Tobacco, O—Oats, CI—Clover, B—Beets, W—V^heat, C—Corn, A
Elementary agriculture with practical arithmetic elementaryagricu01hatc Year: 1906 THE CROP 71 onto the land and plowed under to enrich the soil. It is now in good shape for a second crop of tobacco. Now let us see what has been done: A five year's rotation has been planned, consisting of tobacco, oats, clover, corn and peas, returning to tobacco again the sixth year. During that five years it has been neces- sary to manure this piece of land but once. During two years legumes have been grown and plowed under VARIOUS ROOT SYSTEMS. T—Tobacco, O—Oats, CI—Clover, B—Beets, W—V^heat, C—Corn, A—Alfalfa. to enrich the soil. This manure and these legumes have doubtless kept up the fertility of the soil. The farmer has had an opportunity for four years to manure other pieces of land. At the same time he has been following some plan of rotation on the rest of his farm. Each year he has grown tobacco, he has raised corn and sold his hogs, he has made hay for his cattle,
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