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Lime‐induced loss of soil organic carbon and effect on aggregate stability
Author(s) -
Chan K. Y.,
Heenan D. P.
Publication year - 1999
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/sssaj1999.6361841x
Subject(s) - lime , aggregate (composite) , total organic carbon , soil water , chemistry , soil carbon , carbon fibers , soil science , environmental chemistry , environmental science , geology , mathematics , materials science , paleontology , algorithm , composite number , composite material
We investigated the decline in soil organic C on an Oxic Paleustalf (red earth) as a result of lime application (1.5 t CaCO 3 ha −1 ) in New South Wales, Australia and determined how loss of organic C was related to soil aggregate stability changes. Organic C lost as a result of liming was mainly (up to 84% of total loss) in the form of light fraction (specific gravity <1.8) bound to macroaggregates. With liming, a given level of aggregate stability was achieved at a lower soil organic C level in limed soil (e.g., total C level for a 50% aggregate stability was 13.0 and 17.8 g kg −1 for limed and unlimed soils, respectively). Increased aggregate stability in limed soils suggested formation of new bonding involved Ca bridges.