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Nitrate Adsorption by Some Volcanic‐ash Soils of Southern Chile
Author(s) -
Schalscha E. B.,
Pratt P. F.,
Domecq T. C.
Publication year - 1974
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/sssaj1974.03615995003800010019x
Subject(s) - adsorption , nitrate , soil water , chemistry , environmental chemistry , volcanic ash , mineralogy , volcano , soil science , geology , geochemistry , organic chemistry
Nitrate adsorption by several soils was determined as the difference between the NO 3 ‐ added and that remaining in the supernatant liquid. A nitrate ion electrode method, which was checked against a phenoldisulfonic method, was used to determine the NO 3 ‐ remaining in the supernatant liquid. The time required for equilibrations was 16 hours. The amount of NO 3 ‐ adsorbed varied from 1.2 to 7.5 meq/100 g of soil from a 0.05 M NO 3 ‐ solution for soils of pH values ranging from 5.3 to 6.1. The amount adsorbed increased with decreasing pH.