. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 872 Rural School Leaflet. FOOD Layton S. Hawkins (State Education Department) We all know that food is necessary for the life of plants and animals. Plants make their own food from the materials that they get from the air and the soil. Animals cannot do this, but must use the food manufactured by plants. Some ani:nals obtain this food directly from
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 872 Rural School Leaflet. FOOD Layton S. Hawkins (State Education Department) We all know that food is necessary for the life of plants and animals. Plants make their own food from the materials that they get from the air and the soil. Animals cannot do this, but must use the food manufactured by plants. Some ani:nals obtain this food directly from the plants, others from animals that have in turn lived on plants. Thus we see that all food really comes from the same source. (i) Name all the animals that you know use only plants for food; all that use only animals; all that use some of each. (2) Name two common domestic animals that now use both vegetable and meat food, but whose ancestors were exclusively flesh eaters. All foods are a mixture or combination of several substances, called nutrients. These nutrients are three in number: (i) proteins, or proteids; (2) carbohydrates; (3) fats, or oils. In addition to these nutrients nearly all foods contain some mineral matter, as salt, lime, and the like. You will remember Professor Rice told you last year that nearly nine tenths of the white of the egg is protein. * Carbohydrate is a term applied to starches and sugars. Starch in nearly pure form is found in the potato and in cornstarch. Unfortunately for our understanding of all these nutri- ents, they are not always found in so separate a form as is the protein in the egg or the starch in the potato. In some cases they are combined in such a way that only the chemist can separate them. Our diet or the ration of a cow means the total amount of food eaten in twenty-four hours. A balanced diet or ration is one in which the proper proportion of the above nutrients is maintained. (A well-balanced diet contains 10 to 15 per cent
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