This brings up an only somewhat related topic. If you've every been to the American Rockies, you may have wondered why there are meadow areas, and there are wooded areas, and they don't seem to encroach much on each other over time. Okay, maybe you haven't wondered this, but I was always curious and perplexed by this. Many years later it was explained to me that grasses thrive in soils that are bacteria dominated, and trees thrive in soils that are fungus dominated. Therefore they are happier in the soil where they reside, and are not prone to spread into the other's territory. However, one would think that trees being taller and throwing more shade would eventually win out. There must be something else going on here. Anyone out there have some input on this? Thanks, Mike On Fri, Feb 5, 2016 at 8:23 AM, Tim Eck <teck11@embarqmail.com> wrote: > In various trees that use ecto rather than endomycorrhyzae, the mycorrhyzae > appear to confer some protection against phytophthora and other soilborn > pathogens. > Also, since the cabbage family doesn't use mycorrhyzae, they produce > natural > fungicides as quasi-allelopaths. > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >