>( We talk of vast monocultures.  A cpl things to remember.  Without farming
> much of the country is and was a vast set of monocultures.  Grass in the
> prairies, to certain types of forest.   Its also interesting to note that
in
> the last decades the acreage under tillage has dropped a bit.  And variety
> and of plants cultivated in different ares is changing.)

I have to disagree here... unless "grass" is considered one species and
"tree" another prairie and even relatively uniform forest are still a far
cry from monoculture... I'm fairly certain that many of the beekeepers in
the Dakota prairies could point  out a few different species for us.

Jeremy
West Michigan

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