Cow peas, soy beans, and all legume plants, on account of the nitrogen-producing bacteria on their roots, add valuable plant food to the soil, and much cheaper than it is possible to be obtained in any other way. They also make excellent hay. Kaffir corn is one of the most valuable forage plants known, withstanding drought much better than corn. It is a sure crop under all conditions, producing heads of grain from eight to twelve inches long, and makes the best of poultry feeds. Jerusalem corn, brown dourrah and yellow milo maize are similar to the Kaffir.
Potatoes form our most important truck product and are grown largely on the river-bottom lands.
The early Ohio is the only variety grown in a commercial way. The land yields from one hundred to two hundred bushels of saleable potatoes per acre, varying in price from thirty cents to one dollar per bushel. Commercial growers plant from forty to three hundred acres. The harvest begins as soon as the potatoes are ripe enough to ship, in July, and this continues until the entire crop is disposed of. The ground is then sown to turnips, or some other quick growing crop, which is plowed under as a green manure.