On Sunday, March 17, 2013 10:57:41 AM UTC, Sacha wrote:
I've just read the following gardening tip. Add baking soda to a cup
of your soil and if it bubbles, the soil is acid. Add vinegar and if
it bubbles, the soil is alkaline.

Red cabbage juice makes a great wide range pH indicator. I don't know what the soil pH range is, and thus whether it gives enough resolution for the job.


NT