. Botany for agricultural students. Plants. 346 THALLOI'HV^rES .> that tlie nitrost'ii of the coinpouiids decomposed is put in an avaihU)le form for other phmts. The Bacteria use the chemical energy dciixcd from the oxidation of organic compounds in per- forming the work involved in building up their bodies. There are a few exceptional forms of soil Bacteria which can actually make their own food, and this they do by using this chemical energy, as green ^^-^nn^M^ plants do sunlight, in the hIk ^^^k^^^i construction of foods from ^^E^^^^^^HBB^^I carbon dioxide and water. ' ^^^H^I^^^H^^^^W Th
. Botany for agricultural students. Plants. 346 THALLOI'HV^rES .> that tlie nitrost'ii of the coinpouiids decomposed is put in an avaihU)le form for other phmts. The Bacteria use the chemical energy dciixcd from the oxidation of organic compounds in per- forming the work involved in building up their bodies. There are a few exceptional forms of soil Bacteria which can actually make their own food, and this they do by using this chemical energy, as green ^^-^nn^M^ plants do sunlight, in the hIk ^^^k^^^i construction of foods from ^^E^^^^^^HBB^^I carbon dioxide and water. ' ^^^H^I^^^H^^^^W There other kinds : â '^^^^^^^^^^^^^^ I soil Bacteria which have the power of actually in- creasing the nitrogen in the soil. They incorporate the gaseous nitrogen of the air into nitrogen compounds, which they use in building up their own bodies, and when their bodies decay, these nitrogenous com- pounds are added to the soil, which is therel^y en- riched. Some kinds of these Bacteria live inde- pendently in the soil, while some kinds are associated with higher plants, espe- cially the Legumes, such as Clover, Alfalfa, Beans, etc. {Fig. 299). They enter the roots of these plants, and, as a result of the attack, the roots form nodules in which the Bacteria live and carry on their work of fixing nitro- gen. It is due to their association with these Bacteria that the Legumes are im])ortant in enriching the soil. Pathogenic bacteria. â These are the disease-producing forms. They prey upon both animals and plants. The disease is the. Fig. 299. â A young Red Clover plant, showing the root nodules that are associated with the nitrogen fixing Bacteria. From Farmer's BuUelin 435, U. S. Dept. of Agri- 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 Martin, John N. (John Nathan), b. 1875. New York, John Wil
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1919
