North American Fruit Explorers mailing list at ibiblio

[Jim Fruth <jfruth@uslink.net>]

Charlie,
   Gardens need zinc in parts per million so if you are going to add some to
your compost (If it doesn't have any - did you check?) about a half of a
half pinch should be enough for a cubic yard of loose mulch.  Before you add
that five pound box, I suggest you go to Google and put "zinc toxicity" in
the search line.

Jim Fruth
Pequot Lakes, MN