. Beginnings in agriculture. Agriculture. THE NEEDS OF FARM ANIMALS 235. blood, lean meat, white of egg, and curd of milk are rich in nitrogen. We know that all green plants require nitrogen in their growth. Some of this ni- trogen is found in every part of the plant, in the roots, leaves, stalks, and fruits or grains. When the plants or grains are fed to stock they pro- vide the required nitrogenous matter. Fat is reserve food, or that laid by for special or later use. The amount of it in the body will vary with the age of the animal, the work it does, and the kinds and amounts of food given.
. Beginnings in agriculture. Agriculture. THE NEEDS OF FARM ANIMALS 235. blood, lean meat, white of egg, and curd of milk are rich in nitrogen. We know that all green plants require nitrogen in their growth. Some of this ni- trogen is found in every part of the plant, in the roots, leaves, stalks, and fruits or grains. When the plants or grains are fed to stock they pro- vide the required nitrogenous matter. Fat is reserve food, or that laid by for special or later use. The amount of it in the body will vary with the age of the animal, the work it does, and the kinds and amounts of food given. The lean animal seldom contains less than 5 per cent, and the fattest seldom exceeds 30 per cent. Fat-producing materials are usually given to animals in the form in which they occur in plants ; that is, in the form of starches and sugars. The chemist calls these materials carbohydrates, because they are made from carbon and water. Carbohydrates make up the larger part of dried plants, including all kinds of hay and fodder, and are abundant in roots and grains. Within the animal body, the carbohydrates are changed into fat. Uses of nitrogenous matter and fat. — The nitrogenous parts of plants, which are commonly called protein or proteids, build up the working parts of the body. They may be called muscle- FiG. 117.—Animals re-iviin' drinking water. It may be kept before them at all times in individual troughs or Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mann, Albert Russell, 1880-. New York, Macmillan company
Size: 1631px × 1533px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpubl, booksubjectagriculture
