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Movement of Ammonium Nitrogen in Soils
Author(s) -
Ray H. E.,
MacGregor J. M.,
Schmidt E. L.
Publication year - 1957
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1957.03615995002100030015x
Subject(s) - loam , ammonium , nitrogen , soil water , chemistry , ammonium nitrate , nitrate , agronomy , soil science , environmental chemistry , environmental science , biology , organic chemistry
The distribution of applied ammonium nitrogen in four southern Minnesota soils maintained at constant moisture tension and nitrogen concentration was determined in the laboratory. Ammonium nitrate enriched with N 15 in the ammonium ion was used as a source of nitrogen. The soils varied in texture from loamy fine sand to loam, and in exchange capacity from 3.2 to 34.2 me. per 100 g. Movement of ammonium nitrogen in Anoka loamy fine sand was predominantly downward and lateral. In contrast, movement of ammonium nitrogen in Nicollet loam was nearly symmetrical with slightly greater upward and lateral movement than downward movement. Retention of applied ammonium nitrogen in the zone of injection amounted to 2.0 me. per 100 g. of soil in Anoka loamy fine sand, and to 14.4 me. per 100 g. in Nicollet loam. Movement and retention of ammonium nitrogen were intermediate in the Fayette silt loam and the Barnes loam.