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Sulphate levels in soil of varying pH during incubation with organic materials
Author(s) -
Massoumi A.,
Cornfield A. H.
Publication year - 1965
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740160911
Subject(s) - incubation , straw , compost , chemistry , sulfur , cellulose , total organic carbon , zoology , farmyard manure , incubation period , agronomy , manure , environmental chemistry , organic chemistry , inorganic chemistry , biochemistry , fertilizer , biology
The water‐soluble sulphate levels were followed during incubation (28° for 132 days) of soil (pH 4·7, 6·1 and 7·4) treated with 2% by weight of six different bulky organic materials. Materials with organic carbon/total sulphur (C/S) ratio of 112 or less (farmyard manure, grass, and compost 2) usually caused either very little or only slight net immobilisation of sulphate. Materials with C/S ratio greater than 112 (compost 1, straw, and cellulose) caused net immobilisation of sulphate during the earlier part of incubation, followed by re‐mobilisation of part or all of the sulphur by the end of incubation. Straw was the only material which caused net immobilisation of sulphate at all pH levels by the end of incubation. Differences in the extent of mobilisation or immobilisation due to pH were small or inconsistent except for straw, when maximum immobilisation increased with pH.