David Nebenzahl wrote in news:4c8e565a$0$2401 $ snipped-for-privacy@news.adtechcomputers.com:
I'm not doubting that vinegar is acidic, far from it. However, acetate (the part of vinegar without the acidic H) is a very basic 2-carbon building block of life as we know it, and thus eirther metabolized and "used" to generate energy, or used to build up fats and carbohydrates. I would gather that a bit of lime would neutralize the acid, or that it would just rinse away with a little (artificial) rain. Of course you can overdo the application of vinegar just like that of fertilizer.
Just my gut feelings ...