. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. NON-SYMBIOTIC NITROGEN FIXATION 139 Moreover, synthetic nitrogen compounds not only compete with natural ammonia and nitrates in quantity but they are com- peting with them in price as well and have actually driven from the market the natural product. In Germany "one German elec- tric firm with aid from the city of Berlin recently contracted to CEPMWi' aoaooo zoaooo /adooo L; ENCLAND 0 I S 5 ~ fMNCE. CH/tsAt^MmArf OT/i£R ^g OitASAMOe AAC/VW£'S^ a HABER PROCE^ ^LEGEND' WORU? PPO£>aCT/0^& CO^S(JM
. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. NON-SYMBIOTIC NITROGEN FIXATION 139 Moreover, synthetic nitrogen compounds not only compete with natural ammonia and nitrates in quantity but they are com- peting with them in price as well and have actually driven from the market the natural product. In Germany "one German elec- tric firm with aid from the city of Berlin recently contracted to CEPMWi' aoaooo zoaooo /adooo L; ENCLAND 0 I S 5 ~ fMNCE. CH/tsAt^MmArf OT/i£R ^g OitASAMOe AAC/VW£'S^ a HABER PROCE^ ^LEGEND' WORU? PPO£>aCT/0^& CO^S(JMPr/CW OF F/XED /NOPC4A//C N/TPO&FN eXPP£J6ED /A/ rOA/J Af/TPOCFN Fig. 29.—Nitrogen produced by various processes and then consumed. provide 66,000,000 pounds of fixed nitrogen a year at a cost of three cents a pound for the next twenty-five years/' The supply from this source at the present time is adequate, but such nitrogen usually costs the farmer about twenty cents a pound. At this rate the nitrogen in a bushel of wheat would cost thirty cents, in a ton of beets one dollar, and in a ton of alfalfa hay ten dollars. Is there no other source to which the farmer can turn? Virgin soil received its nitrogen from other sources, namely, the microscopic plants. Development of Our Knowledge.—It has been known for. 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 Greaves, Joseph Eames, 1880-; Greaves, Ethelyn O. , joint author. New York, D. Van Nostrand Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteriologyagricult
