Let us now see how easily plant food

Let us now see how easily plant food

Let us now see how easily plant food

Let us now see how easily plant food may be saved by the rotation of crops.

If you sow wheat in the autumn it is ready to be harvested in time for planting cowpeas. Plow or disk the wheat stubble, and sow the same field to cowpeas. If the wheat crop has exhausted the greater part of the nitrogen of the soil, it makes no difference to the cowpea; for the cowpea will get its nitrogen from the air and not only provide for its own growth but will leave quantities of nitrogen in the queer nodules of its roots for the crops coming after it in the rotation.

Fig. 27. Cowpeas and Corn—October