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CHEMICAL STUDIES OF SOIL ORGANIC MATTER
Author(s) -
TINSLEY JOSEPH,
SALAM ABDUS
Publication year - 1961
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1961.tb00915.x
Subject(s) - pyrophosphate , chemistry , sodium oxalate , organic matter , calcareous , sodium , hydrochloric acid , environmental chemistry , oxalate , sodium citrate , reagent , soil organic matter , soil water , extraction (chemistry) , inorganic chemistry , nuclear chemistry , chromatography , organic chemistry , soil science , botany , geology , biology , medicine , pathology , enzyme
Summary Experiments with an untreated calcareous meadow soil containing 18 per cent. organic matter, and with the sodium soil prepared after treatment with dilute hydrochloric acid, have confirmed that sodium pyrophosphate, citrate, and oxalate solutions are good reagents for partial extraction of organic matter from soils, and have further demonstrated that sodium‐sulphite solution is as effective as pyrophosphate at comparable concentrations and pH values. Boiling for 1 hour with 0.5 N sodium pyrophosphate and sulphite solutions at pH 8.4 dissolved almost 40 per cent. of the organic nitrogen from the untreated soil, which is more than double the quantity dissolved by shaking for 24 hours at 18° C.