Brian,
Yes there are intermediate variants and it's possible to trace the one evolving into the other. Obviously at some point some farm hand thought it would be interesting to burlesque it into the Acre of Land form by changing it to the inheritance angle rather than the riddle, but the content is largely present in some evolving variants of Scarborough Fair/Parsley sage.

Of course burlesquing of child ballads is fairly common, such as , Barbara Allen, Lord Lovell, George Collins, Demon Lover, Lord Randall, etc. and other broadside ballads as well.