Article has a table. Sunchoke, Chicory and Dandelion all run in the teens, while yacon runs from 3 to nineteen. Looks like Camas is the champ, running from 12 to 22. I am presuming that the chart is reporting percentages, although I don't see it indicated in either the legend or the text.
After three months of being pooless the hair and skin on this tiny ad is glorious!
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars