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Many soils in Sindh are salinised due to poor irrigation drainage and so it is not uncommon to have salty soil and much of the shallow groundwater is brackish. Simple EC/pH meters will suffice to determine the relative problem in terms of salinity.

If there is a concern over agro-chemicals then I suggest that it would be more appropriate to collect samples and have then tested in a water quality labotory. I will see if I can find out details of which labs we use with the water quality testing we get done. I will also ask for names of reputable local supplers of water quality kits - importing may be problematic through customs etc.