In some sections the killing and dressing of the ducks is done by men with whom duck picking is a trade at which they work during its season. In others the killing is done by men, but the pickers are women living in the vicinity of the farm, who can be secured for this work whenever they are needed. A farm that markets 50,000 ducks in a season will keep a large force of pickers busy the greater part of the time for many months. Quite a large building is required to provide room for the pickers to work in, for tanks for cooling 500 or more ducks at once, for space for the men who pack them, and for lofts for drying the feathers before they are sold. This drying process must be used whether the birds are dry-picked or are scalded before the feathers are removed. Water on feathers dries quickly, but the oil in the quills dries very slowly. The feathers from one duck are worth only a few cents, and where small numbers are grown the feathers are hardly worth the trouble of saving and curing. On a large plant the total product of feathers for a season amounts to several thousand dollars, and it pays to provide facilities for taking proper care of them. After the crop of ducks on an inland farm is marketed, the fences must be removed and the land plowed and sowed with winter rye. This crop is used extensively for this purpose, because it is a gross feeder and takes the impurities from the soil very fast, and also furnishes a good supply of green food for the stock ducks during the winter and for the first young ducks put on the land in the spring. Where the farms are large enough, all ducks may be kept off a part of the land each year and crops grown on it. The farms located at the waterside do not have to look to the purification of the land so carefully, because the rains wash a great deal of the droppings away. Some of these farms get large quantities of river grass from the streams and cut it up to mix with the food for the ducks. DUCK FANCIERS' METHODS There are two general classes of duck fanciers: those who breed one or more of the useful varieties for fine form and feather points, and those who breed the ornamental varieties. Breeders of the latter class usually keep other kinds of ornamental poultry also.