EC e is time consuming but yet its the reference method when assessing the soil salinity of soil, i wonder if there any empirical equation linking the EC e , EC 1:5 and Soil texture?
thank you for your answers
Kind regards
Yacine Louadj
You wont find much literature on the issue, but i could get here one reference . The relation between ECe and EC2:1 is about 4, hence : ECe = 4 EC1:2.(ILRI, 2003, This paper discusses soil salinity. Lecture notes, International Course on Land Drainage International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. Relevant PDF enslosed
I personally tried many times to establish a relation between EC(1:2) and ECe for sodic soils of the Indo-Gangetic Plains but it did not work well. To assess the salinity/sodicity it appears that the determination of ECe by the standard method is the only way to classify the salt-affected soils especially sodic and saline-sodic soils. I do not think any positive role of soil texture has into it.
You wont find much literature on the issue, but i could get here one reference . The relation between ECe and EC2:1 is about 4, hence : ECe = 4 EC1:2.(ILRI, 2003, This paper discusses soil salinity. Lecture notes, International Course on Land Drainage International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. Relevant PDF enslosed
The relation between ECe and EC 1:2.5 for South Gujarat coastal alluvial plain (Aquepts Ochrepts) is ECe = EC1:2.5 x 3.429+0..606. For getting this relationship we have analysed 500 soil samples 25 years back.
I go with Dr Srivastava, the factor is 4-5, as threshold level of EC 1:2 salinity used in Soil testing laboratories is 0.8 dS/m vis-a-vis 4dS/m ECe salinity
Kindly look at these paper
Khorsandi F., and F. A. Yazdi. 2011. Estimation of saturated paste extracts’ electrical conductivity from 1:5 soil/water suspension and gypsum. Commun. Soil Sci. Plant Anal. 42, 315-321.
Sonmez S., D. Buyuktas, F. Okturen, and S. Citak. 2008. Assessment of different soil to water ratios (1:1, 1:2.5, 1:5) in soil salinity studies. Geoderma. 144, 361-369.
Ozcan H., H. Ekinci, Y. Yigini, and O. Yuksel. 2006. Comparison of four soil salinity extraction methods. Proceedings of 18th International Soil Meeting on “Soil Sustaining Life on Earth, Managing Soil and Technology”, May 22–26, 2006, Sanlıurfa, Turkey. pp. 697-703.
Sir,
During my attachment training programme, I have worked on the aspect of salinity changes by the addition on deficit water in saline soil. During the period, I have analysed more than 100 samples for EC, ECe, pH, pHe and so on. End of the experiment I got a relationship for EC=ECe as ECe=3-4EC.
Attached link may useful others too.
Regards.
You may not need always to take EC if the soil is leached, acid or acidic (or even neutral, grown with tolerant crops etc. However, poor drainage can start in irrigated areas and increase salinity that can worsen the drainage.
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