Questions about the jubilee year are part of Shemitta. The FR expert on that is Carrie Okie who happens to have an internet book called Shemitta: For The Land Is Mine.
As it happens one of Israel’s top scholars on that part of the Old testament did discuss the book with the author in detail. Rav Moore’s comment “fascinating” - repeated many times.
Google it, you will like it.
PS Rav Moore would be totally underwhelmed with the “Rabbinical theory” advanced by Rabbi Yovadia Yosef.
“Google it, you will like it.”
Thank you - I will indeed check it out.