Jay, you are compleely right about this:
>> But you are throwing out a lot of negative information about vinegar, using a words like, probably, offhand expect , thinking that.
>> Addition of 24 % vinegar to a peat soil decreased the pH of the soil from 7.3 to 5.6. However, after 48 hours the pH values of the soil returned to 7.0-7.5"
If that also applies to much less organic soils like heavy clay and sandy loam, it would knock down my concern that using enough of a non-selective plant poison like vinegar would make soil too acid.
And since I haven't tried it myself and DON'T know that acidifying soil is a real concern, I shouldn't raise it any more than mentioning the possibility once in passing.
>> Spraying, not pouring
That sounds smart.
