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Nitrogen in the Rainwater at Different Points in Kentucky 1
Author(s) -
Freeman J. F.
Publication year - 1924
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1924.00021962001600060002x
Subject(s) - citation , rainwater harvesting , nitrogen , library science , mathematics , combinatorics , computer science , chemistry , biology , ecology , organic chemistry
Considerable work has been done in determining the amount of nitrogen in the precipitation in various parts of the world. Wilson (3)' of Cornell University has reviewed quite fully the literature on this subject. Since collections of rainfall were being made at various points in Kentucky for the determination of sulfur, it was thought advisable at the same time to determine the amounts of nitrogen present. The location of the gauges used in collecting the rainwater with reference to railroads and cities is described in the preceding article. At Russellville, Greenville, Mayfield and Lone Oak, the gauges were set up at the edge of the farmyard, near the stables and usually not more than 50 ft. from the residence of the caretaker. At Lincoln Institute and Lexington (Van Meter Farm) the gauges were located in open fields. The rainfall was analyzed by periods of three months each. Results were obtained for five periods, beginning January i, 1922, and continuing thru April 30, 1923. The results for the Lexington (Fayette National Bank) location are not included in Tables 2 and 3. The rainwater of certain of the fields for the first period contained considerable foreign matter of an organic nature. For this reason, only the results of the last four periods are used in determining the annual results. The Nessler reaction employed in water analysis, as outlined by Olsen (2), was used in determining the ammonia nitrogen. The nitrate nitrogen was determined by the phenoldisulfonic acid method. One hundred cc. aliquots of the rainwater were evaporated to dryness on the hot water bath in the presence of a small amount