Premium
Quantitative Erfassung der reduzierten Substanzen in Unterwasserböden
Author(s) -
Fischer W. R.,
Baumann G.
Publication year - 1976
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19761390313
Subject(s) - potassium dichromate , titration , chemistry , potassium , soil water , sulfuric acid , environmental chemistry , redox , mineralogy , inorganic chemistry , environmental science , soil science , organic chemistry
Quantitative determination of reduced substances in subhydric soils The determination of reduced substances is possible by rapid oxidation with a diluted potassium dichromate/sulfuric acid solution at room temperature, and subsequent titration with FeSO 4 solution. These values (meq/100 ml of fresh sample) show a nonlinear, negative correlation with redox potential, and increase with increasing content of organic material. Sulfides, expressed as FeS, amount to appr. 50 % of the reduction equivalents. Subhydric soils rich in nutrients show an increasing amount of reduced substances with increasing depth, whereas oligotrophic and mesotrophic soils give no distinct depth function.