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Harmonizing soil organic carbon estimates in historical and current data

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Title Harmonizing soil organic carbon estimates in historical and current data
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Creator A. Velmurugan, Gopal Krishan, V. K. Dadhwal, Suresh Kumar, T. P. Swarnam and S. K. Saha
 
Subject Clay, land use, oxidative combustion, soil organic carbon, Walkley and Black method.
 
Description Not Available
Estimation of soil organic carbon (SOC) is indispensable
in studies involving soils and global climate
change. SOC retention in soil is a function of climate,
vegetation and intrinsic soil properties. Historically,
SOC estimates are based on wet digestion which gives
low carbon recovery. This results in underestimation
of its density and stock, however, most of the existing
historical and current SOC data sets are based on wet
digestion. Hence, we have compared the wet digestion
with precise oxidative combustion method for SOC
estimation, to develop factors for conversion of historical
data into comparable values. It was found that
the recovery percentage of SOC is lower than oxidative
method and it further decreased with increase in
clay content. In case of land use, the recovery percentage
is higher in forest soils, followed by agricultural
soils and the least in wasteland. A general correction
factor of 1.42 and clay content specific correction factors
of 1.35, 1.45 and 1.81 are recommended to convert
historical data into current reliable SOC estimates.
Keywords: Clay, land use, oxidative combustion
Not Available
 
Date 2021-01-23T05:40:16Z
2021-01-23T05:40:16Z
2009-07-13
 
Type Research Paper
 
Identifier A. Velmurugan, Gopal Krishan, V. K. Dadhwal, Suresh Kumar, T. P. Swarnam and S. K. Saha,Harmonizing soil organic carbon estimates in historical and current data,CURRENT SCIENCE
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http://krishi.icar.gov.in/jspui/handle/123456789/44989
 
Language English
 
Relation Not Available;
 
Publisher CURRENT SCIENCE