Farm Science: A Foundation Textbook on Agriculture

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World Book Company, 1918 - Agriculture - 344 pages

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Page 347 - This textbook may be borrowed for two weeks, with the privilege of renewing it once. A fine of five cents a day is incurred by failure to return a book on the date when it is due. The Education Library is open from 9 to 5 daily except Saturday when it closes at 12.30.
Page 207 - Diagram indicating the nitrogen changes in the soil produced by the action of bacteria. The arrows indicate the course of the changes which various groups of bacteria may produce in the nitrogen compounds of the soil. A, action of ammonifying bacteria which change organic nitrogen to ammonia; B, action of nitrifying bacteria which change ammonia to nitrite; C, action of nitrifying bacteria which change nitrite to nitrate; D, assimilation of nitrate by green plants; K.
Page 5 - Inasmuch as a molecule of water consists of two atoms of hydrogen and one atom of oxygen...
Page 159 - ... about on a par with most of the land used for tobacco in the neighborhood. FERTILIZERS FOR TOBACCO. The fertilizer experiments show that a soil which will yield, say, 900 pounds of tobacco to the acre from the use of the customary application of 400 pounds of 3-8-3 fertilizer (3 per cent of ammonia, 8 per cent of phosphoric acid, and 3 per cent of potash) costing $5, will generally yield as much as 1,400 pounds by using a much heavier application of a properly balanced fertilizer costing $30...
Page 5 - A molecule of pure limestone, or calcium carbonate, is composed of one atom of calcium, one of carbon, and three of oxygen.
Page 60 - We list below the ideas that we believe to be feasible, not in the order of their importance, but in the order in which they can be reduced to plan and action.
Page 296 - The stated objectives of many of the studies of the new machines or sources of power which have been carried on by the state experiment stations and the United States Department of Agriculture have been: To obtain and make available information that will enable farmers in the area to decide whether the new machine will be economical. (See statement of objectives for Project 20C.) This is a somewhat more restricted objective than those stated above and has usually led to a somewhat narrower...
Page 207 - IT, action of bacteria which change nitrogen gas Into proteid nitrogen ; /. action of bacteria which In symbiosis with leguminous plants change nitrogen gas Into proteid nitrogen ; K, action of bacteria which In symbiosis with certain nonlegumlnous plants change nitrogen gag into proteid nitrogen.
Page 212 - All that can be done here is to call attention to some of his most striking qualities. Foremost, of course, is the temper of the man. From the beginning he was sure of himself and sure of his mission; he had his purpose plain and clear. There is no mental development, hardly, visible in his work, only training, undertaken anxiously and prayerfully and with...

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