Interesting. I wonder if there will be a fad of switching from white clover to Caucasian clover.
I found an interesting
paper on establishing it.
The only apparent limitation is that establishment of kura clover is more challenging than other forage legumes. The reason for this is that the pattern of development of kura clover seedlings is different from other legumes. Kura clover seedlings germinate, emerge and develop the first three true leaves at about the same rate as other legumes, but then leaf development slows and energy from photosynthesis is used for root and rhizome development. Also, kura clover produces few or no upright stems during the first year and its short stature makes it extremely susceptible to shading from weeds or existing grass in the field.
It sounds like a decent choice to plant on top of a zone>2 tree stump.
Evidence exists that strains of Rhizobia specific for kura clover are not as robust as other Rhizobia and do not survive long after application to the seed. Therefore it is recommended to apply Rhizobia to the seed on the day of sowing.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.