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Journal of Agronomy
  Year: 2008 | Volume: 7 | Issue: 2 | Page No.: 127-137
DOI: 10.3923/ja.2008.127.137
 
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Soil Organic Carbon Fractions and Aggregate Stability in Carbonated and No Carbonated Soils in Tunisia

A. Bouajila and T. Gallali

Abstract:
This research aimed to study the relationship between different organic matter fractions and aggregate stability in carbonated and no carbonated soils in Tunisia. Samples of soil were taken from A or Ap horizon at twelve carbonated and ten no carbonated soils. Aggregate stability was tested by Le Bissonnais method. Total soil organic carbon (SOC), particulate organic carbon (POC), hot-water-extract-polysaccharides (HWEP) and humic compounds (HC: humic acids (HA) and fulvic acids (FA)) were analysed. Both carbonated and no carbonated horizons showed high SOC and POC contents, notably under forest. While, HWEP and HC (HA and FA) contents were greater in no carbonated soils. Across all horizons, positive correlation was found between SOC and POC. Soil stability test showed that horizons were affected by fast wetting rather than mechanical breakdowns (MWDFW<MWDMB). The most stable horizon was a carbonated soil with important SOC content. However, there was a significant and positive relationship between SOC, POC and HC and aggregate stability only in no carbonated topsoil. Consequently, relationship between organic matter fractions and aggregate stability changes when soil properties vary. Accordingly, the present study may be useful to suggest practices that improve soil aggregate stability and organic matter sequestration to help retard soil loss and degradation.
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How to cite this article:

A. Bouajila and T. Gallali, 2008. Soil Organic Carbon Fractions and Aggregate Stability in Carbonated and No Carbonated Soils in Tunisia. Journal of Agronomy, 7: 127-137.

DOI: 10.3923/ja.2008.127.137

URL: https://scialert.net/abstract/?doi=ja.2008.127.137

COMMENTS
10 January, 2020
NEBIYOU M:
Nice paper.
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