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Relative Movement of Bromide and Nitrate in Soils under Three Irrigation Systems
Author(s) -
Onken Arthur B.,
Wendt C. W.,
Hargrove R. S.,
Wilke O. C.
Publication year - 1977
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/sssaj1977.03615995004100010018x
Subject(s) - nitrate , bromide , soil water , irrigation , chemistry , agronomy , sodium nitrate , mineralization (soil science) , sodium , infiltration (hvac) , environmental chemistry , environmental science , soil science , inorganic chemistry , biology , geography , organic chemistry , meteorology
Bromide has desirable characteristics as an indicator of nitrate movement in soils, although it has not been tested under field conditions. We studied its field applicability by growing sweet corn ( Zea mays L.) on plots to which a mixture of sodium nitrate and sodium bromide were band applied. Irrigation was accomplished by either furrow, sprinkler or subirrigation. Nitrate and Br ‐ moved together in the soil profile, but the concentrations of NO 3 ‐ ‐N and Br ‐ were quantitatively unrelated. The lack of a quantitative relationship was probably due to (i) NO 3 ‐ ‐N was the sum of that already present, that from mineralization of organic matter, plus that applied while bromide came only from that applied, and (ii) NO 3 ‐ ‐N from all three of these sources and Br ‐ were removed from the soil at different rates by the growing crop.