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This graph shows the soil pH of 94 sites. pH measures whether a soil is acidic or basic (alkaline). Most of our sites are alkaline with a pH greater than 7.0, and about half of our sites are in the “Concerning” range, with a pH greater than 7.7. Colorado’s Front Range is known for its alkaline soils. Our high pH is partly why soil microbes have a much harder time in Colorado, and why improving our soil’s health takes longer here than in other parts of the country.
Elizabeth Black is the producer of the Citizen Science Soil Health Project