The ground for hemp is prepared as for other grain crops. The seed is generally broadcasted for a fiber crop and then harrowed in. No cultivation is required after seeding. If hemp is grown for seed, it is best to plant with a drill so that the crop may be cultivated. The stalks after being cut are put in shocks until they are dry. Then the seeds are threshed. Large amounts of hemp seed are sold for caged birds and for poultry; it is also used for paint-oils. SECTION XLVII. BUCKWHEAT Buckwheat shares with rye and cowpeas the power to make a fairly good crop on poor land. At the same time, of course, a full crop can be expected only from fertile land. The three varieties most grown in America are the common gray, the silver-hull, and the Japanese. The seeds of the common gray are larger than the silver-hull, but not so large as the Japanese. The seeds from the gray variety are generally regarded as inferior to the other two. This crop is grown to best advantage in climates where the nights are cool and moist. It matures more quickly than any other grain crop and is remarkably free from disease. The yield varies from ten to forty bushels an acre. Buckwheat does not seem to draw plant food heavily from the soil and can be grown on the same land from year to year. In fertilizing buckwheat land, green manures and rich nitrogenous fertilizers should be avoided. These cause such a luxuriant growth that the stalks lodge badly. The time of seeding will have to be settled by the height of the land and by the climate. In northern climates and in high altitudes the seeding is generally done in May or June. In southern climates and in low altitudes the planting may wait until July or August. The plant usually matures in about seventy days. It cannot stand warm weather at blooming-time, and must always be planted so that it may escape warm weather in its blooming period and cold weather in its maturing season. The seeds are commonly broadcasted at an average rate of four pecks to the acre. If the land is loose and pulverized, it should be rolled. [Illustration: FIG. 220. BUCKWHEAT IN SHOCK] Buckwheat ripens unevenly and will continue to bloom until frost. Harvesting usually begins just after the first crop of seeds have matured. To keep the grains from shattering, the harvesting is best done during damp or cloudy days or early in the morning while the dew is still on the grain. The grain should be threshed as soon as it is dry enough to go through the thresher. Buckwheat is grown largely for table use. The grain is crushed into a dark flour that makes most palatable breakfast cakes. The grain, especially when mixed with corn, is becoming popular for poultry food. The middlings, which are rich in fats and protein, are prized for dairy cows. SECTION XLVIII. RICE