Charles,
As a biologist, I must disagree with your statement that "prairie grass left alone takes over everything. Like pines in Ontario, or Manzinita and scrub brush in south Texas."
For a quick primer on the immense biodiversity found in native prairies (matched only by rainforest ecosystems), see:
http://www.nps.gov/tapr/naturescience/a-complex-prairie-ecosystem.htm
A Complex Prairie Ecosystem - Tallgrass Prairie National Preserve (U.S. National Park Service)
A Complex Prairie Ecosystem
Read more...<http://www.nps.gov/tapr/naturescience/a-complex-prairie-ecosystem.htm>
?
Corn, soy, and wheatfields are wastelands by comparison to what they have replaced.
Christina
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