I'm glad everything above 30 is a distinctly different color from below 30 because that's a crucial number since above 30 inches of precipitation is what's considered necessary for intensive agriculture without irrigation. That's why the 100th Meridian forms such a stark dividing line in population density.
Edit: The 30 inch rule is a bit more complicated than I thought. Corn, arguably America's most important crop, does need 30 inches, but wheat can survive on less. But it is clear that 30 inches is the crucial boundary that divides the humid east from the arid west as you can see in the map it lines up with the 100th meridian, which forms the vertical border between Oklahoma and Texas.
Buffalo-Castle on May 24th, 2020 at 00:52 UTC »
Interesting. To be clear, this is rainfall as stated and not precip.? Thanks.
Gadbwah on May 24th, 2020 at 01:46 UTC »
What's up with that NC - SC - TN border area?
Cool map
kernals12 on May 24th, 2020 at 02:22 UTC »
I'm glad everything above 30 is a distinctly different color from below 30 because that's a crucial number since above 30 inches of precipitation is what's considered necessary for intensive agriculture without irrigation. That's why the 100th Meridian forms such a stark dividing line in population density.
Edit: The 30 inch rule is a bit more complicated than I thought. Corn, arguably America's most important crop, does need 30 inches, but wheat can survive on less. But it is clear that 30 inches is the crucial boundary that divides the humid east from the arid west as you can see in the map it lines up with the 100th meridian, which forms the vertical border between Oklahoma and Texas.