What Did Charles Townshend Invent?

The four-field crop rotation system was devised to allow fields to rest while still growing food. If a crop is continually grown in the same field, the soil will lose nutrients in time and become far less effective. Dividing a large field into four fields and rotating them each season allows the fields to retain high levels of nutrients. Townshend primarily used wheat, clover, oats and turnips in his system.