The perennial advantage

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The perennial advantage

Annual crops rely more heavily on human inputs.
Humans can only respond to environmental changes
on the scale of months or seasons and hectares or
square kilometers.
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Soil carbon content after 100 years of annual
cropping and hay removal from native prairie
meadows.
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Percent U.S. Land Area with Wind Resource Class 3
or Above (Annual)
Wind Energy Potential in the United States D.L.
Elliott and M.N. Schwartz September 1993.
PNL-SA-23109. Richland, WA Pacific Northwest
Laboratory. NTIS no. DE94001667. http//www.nrel.g
ov/wind/wind_potential.html
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THE LAND INSTITUTE
SALINA, KANSAS
www.landinstitute.org