The most satisfactory and profitable gardening on a small or large scale requires rotation of crops. The strawberry rows should be moved at the end of two years (258. The One-year System) to fresh soil; the rows in sweet peas, garden peas, and beans should be annually rotated with the sweet corn and potatoes; and indeed all crops should be put on fresh soil each year, except asparagus and small fruits.
There are other reasons than mere vigor of growth for a succession of garden crops. As instances, onions and turnips if grown two years or more on the same soil are subject to insect injury and the potato, beet, onion, melon, and sweet corn are more liable to scab, rust, smut, and other fungous troubles than they are when systematically rotated -annually.
Some of our methodic farmers include a crop of cow-peas, field peas, or other legumes in the system of rotation as a part of the garden management to give fresh soil well stocked with humus and nitrogen for melons, squashes, and potatoes. With this plan and the growing of garden peas, sweet peas, and beans the whole surface can be rotated with nitrogen-producing crops at least once in three years.