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Unsaturated Flow Phenomena in Panoche Sandy Clay Loam as Indicated by Leaching of Chloride and Nitrate Ions
Author(s) -
Dyer Kenneth L.
Publication year - 1965
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/sssaj1965.03615995002900020006x
Subject(s) - loam , moisture , leaching (pedology) , gypsum , soil water , nitrate , chloride , water content , field capacity , soil science , chemistry , environmental science , environmental chemistry , geology , geotechnical engineering , organic chemistry , paleontology
Moisture suctions greater than 15 atmospheres are a common occurrence in the subsoils and substrata underlying unirrigated soils of the Panoche series. One such soil which contained appreciable quantities of Cl ‐ and NO 3 ‐ was taken from the field at a moisture suction of 16 atmospheres and packed into a column measuring 117 inches in height. This column was partially leached under unsaturated flow conditions with a saturated gypsum solution. Subsequent analyses indicated that about half the original soil moisture was not displaced downward with the dissolved Cl ‐ and NO 3 ‐ . The Cl ‐ and NO 3 ‐ concentrations contained in the displaced portion of the soil solution were about double those in the original soil solution existing at 16 atmospheres suction.