The source you provided is clear on this for the non-fixed term variants. Here is another source:
https://resourcehub.bakermckenzie.com/en/resources/global-co...
> What are the usual forms of leases?
> Ordinary leases (with statutory right of renewal except in certain instances)
> Fixed-term leases (with no right of renewal)
Note that you also characterized the law as providing an upper bound on lease terms, when actually it's the opposite:
> such as ground leases must be 30 years or more except a fixed-term ground lease, which must be 50 years or more
I disagree with most everything you say, and I am not sure further discussion would be productive.
Aside from the minutiae: I do not think there is any reasonable way except assessment to disentangle the value of land and improvements in a way that tracks land value in the short term, which is required for a land value tax to yield its substantial benefits.