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Farm1 wrote:
Huh? I know sod all about Chemistry but even I know Washing Soda
is
sodium carbonate whereas salt is sodium chloride.

Sodium Carbonate (Na2CO3) is a salt. Sodium Chloride (NaCl) is table
salt, but there are many other salts.

Are all sodiums bad for soil or just in significant quantities or
what?

I would imagine that Sodium Carbonate would be just as harmful
as Sodium Chloride.

Thanks for the response. Do you know what type of salts are involved
in dryland salinity?