How calculate water quality index for irrigation purpose if you have concentration of all cation, anions ,SAR, SP, RSC EC and pH.
From water quality data , the water quality index can be evaluated and for this published work is available along with softwares.
Dear Professor Akram,
I suggest you the following interesting attached paper.
Water with RSC> 2 needs to be avoided in loamy and clayey textured soils,which have clay CEC > 40 me/100 g .
The following publications will give you classifications/ratings for some of your measurements (salinity/sodicity etc).
A "global" one from FAO heavily influenced by workers from US (and to lesser extent the Middle East)
..and a useful comparison from a very useful publication produced for Eastern Australia
Hope this helps.
Regards
Andrew
https://publications.qld.gov.au/storage/f/2013-12-19T04%3A10%3A23.754Z/salinity-management-handbook.pdf
http://www.fao.org/docrep/003/T0234E/T0234E00.htm
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