State soil?

While re-reading Natural Capitalism, I took another book off the shelf to revisit: Donella Meadow's Global Citizen, for me, an eye-opening book. Hers is a voice much missed; I learned of her work through an environmental issues course, unfortunately after her death. But her co-authored Limits to Growth raised the bar on sustainability issues, and Global Citizen is a collection of her essays and newspaper columns that serves as a good introduction and summary of her expansive and important work. Journalist, farmer, environmental scientist (a biophysicist, actually) and teacher, she was a founder of the Sustainability Institute, what she called a "think-do-tank."

Flipping through the pages, I came across an odd tidbit... In addition to state flowers and birds, there are 20 states that have an official state soil. Who knew? If it wasn't for Global Citizen, I wouldn't. Dr. Meadows, while writing about farms, food and land, mentions Wisconsin's state soil, the Antigo Silt Loam. Given my fascination with dirt, I did a Google search. And there it was: Washington State's official soil is "Tokul." (Natural Resources Conservation Service - PDF about the soil). We apparently have more than a million acres of the stuff, all on the west side of the Cascades, and it's extraordinarily fertile ("among the most productive soils in the world").

Really, who knew? Did you? How is this depicted anywhere? A bird, a flower, but soil? Here's a link to the list.