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Micro Structure of Salt Affected Soil as Influenced by Various Amendments | ||
| Kirkuk University Journal for Agricultural Sciences (KUJAS) | ||
| Article 1, Volume 2, Issue 2, 2011, Pages 19-32 PDF (0 K) | ||
| DOI: 10.58928/ku11.02205 | ||
| Author | ||
| Hussein A. M. Al- Kahwaji | ||
| Abstract | ||
| Analytical study the pictures of scanning electron microscope for experiment, 1.100 kg of (2.8 - 5mm) aggregate of silty clay soil was used with different level of residuces of liquorice and gypsum, phosphogypsum and chalk. These aggregate was designed in three experiments as follow: 1- Non salted aggregates mixed with amendments. 2- Non salted aggregates mixed with amendments and 0.6N sodium chloride flowed and then water. 3- Aggregates were salted with 0.6 N sodium chloride and then mixed with amendments. Aggregate of (2.8 - 5 mm) was checked under scanning electron microscope before and after flowing the water and salt solution. The results shows increasing in hydraulic conductivity in all treatments compared with control. Mean while 10 t /ha gypsum + 1% liquorice gave higher hydraulic conductivity this due to the share effect of gypsum and liquorice. However the treated aggregates of experiment 2 and 3 shows reducing the hydraulic conductivity in all treatments were salted before or after leaching. This was due to unstable aggregates followed by dispersion of plates with deformation in their edges which seen under scanning electron microscope for all treated aggregate treatments unless the 10t/ ha gypsum+ 1% Liquorice as result of sub -stable of structure. However some of treatments especially after the flowing salt solution showed clay particles and aggregate moved and constricted in pores in all chemical treatments were as liquorice residues treatments plates were thick and small aggregates cordoned off as a result of slapping, dispersion of organic matter and restricted of pores between micro-aggregate. | ||
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