. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. The Utilization of Foods 83 oxygen from the atmosphere, and the roots from the air that is in the soil. Wet soils are unsuited to the growth of many plants, not because of the ^ ». water present, but because of the lack of a sufl&cient oxygen supply for the roots. Drain- age is a valuable agricultural practice not only because it removes excess water, but also because it draws air (oxygen) into the soil. When the farmer breaks the crust on the surface, he is making it possible f
. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. The Utilization of Foods 83 oxygen from the atmosphere, and the roots from the air that is in the soil. Wet soils are unsuited to the growth of many plants, not because of the ^ ». water present, but because of the lack of a sufl&cient oxygen supply for the roots. Drain- age is a valuable agricultural practice not only because it removes excess water, but also because it draws air (oxygen) into the soil. When the farmer breaks the crust on the surface, he is making it possible for more oxygen to reach the roots of his crop. The plant and the process of respiration may be compared to a manufacturing estabHshment and the work that goes on in it. The power stations are every Hving cell of root, stem, and. Fig. so. Carbon dioxid is given oil from the respiration of the flowers. The machinery The fuel The process The product The waste leaf. is the protoplasm, is foods, especially carbohydrates, is the combining of food and oxygen, is energy, is carbon dioxid and water. The working hours are twenty-four a day. Respiration and photosynthesis contrasted. In photo- synthesis, carbon dioxid and water are combined to form the complex molecules of carbohydrates, and a large number of atoms of oxygen are set free in the process. When, in res- piration, the complex carbohydrate molecules are again combined with oxygen, simple molecules of carbon dioxid. 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 Transeau, Edgar Nelson, 1875-1960. Yonkers-on-Hudson, N. Y. , World Book Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
