Phisherman wrote:

Actually table salt is very bad for your landscaping. The only way to
rid the soil of table salt is to dilute it. On the other hand,
RoundUp breaks down when in contact with the soil--much safer than
table salt if you intent to landscape later. I know RoundUp contains
a surfactant, but you can increase the intensity of the RoundUp by
spraying the poison ivy with a soap solution (1 T of dishwashing
liquid in a 1 qt spray bottle of warm water). Allow this to dry, then
apply the RoundUp. I would never mix RoundUp (or any other product)
with another compound unless specified on the manufacturer's label. I
know that RoundUp specifies that it is "waterproof" after 2-3 hours,
but you'll get better results when there is no rain in the next 24
hours.

I think you may have misunderstood what I was saying. Toxicity
affecting the human body is measured with salt as the standard ("0" on
the reference chart). I did not mean to suggest that salt had anything
to do with landscaping.

Bob