These beets do well in a great variety of soils if the land is rich, well prepared, and well drained, and has a porous subsoil.
Beets cannot grow to a large size in hard land. Hence deep plowing is very necessary for this crop. The soil should be loose enough for the whole body of the beet to remain underground. Some growers prefer spring plowing and some fall plowing, but all agree that the land should not be turned less than eight or ten inches. The subsoil, however, should not be turned up too much at the first deep plowing.
Too much care cannot be taken to make the seed-bed firm and mellow and to have it free from clods. If the soil is dry at planting-time and there is likelihood of high winds, the seed-bed may be rolled with profit. Experienced growers use from ten to twelve pounds of seeds to an acre. It is better to use too many rather than too few seeds, for it is easy to thin out the plants, but rather difficult to transplant them. The seeds are usually drilled in rows about twenty inches apart. Of course, if the soil is rather warm and moist at planting-time, fewer seeds will be needed than when germination is likely to be slow.
A good rotation should always be planned for this beet. A very successful one is as follows: for the first year, corn heavily fertilized with stable manure; for the second year, sugar-beets; for the third year, oats or barley; for the fourth year, clover; then go back again to corn. In addition to keeping the soil fertile, there are two gains from this rotation: first, the clean cultivation of the corn crop just ahead of the beets destroys many of the weed seeds; second, the beets must be protected from too much nitrogen in the soil, for an excess of nitrogen makes a beet too large to be rich in sugar. The manure, heavily applied to the corn, will leave enough nitrogen and other plant food in the soil to make a good crop of beets and avoid any danger of an excess.
When the outside leaves of the beet take on a yellow tinge and drop to the ground, the beets are ripe. The mature beets are richer in sugar than the immature, therefore they should not be harvested too soon. They may remain in the ground without injury for some time after they are ripe. Cold weather does not injure the roots unless it is accompanied by freezing and thawing.