Ki Tavo means “when you enter” and begins with a variety of agricultural regulations that take effect once Israel has entered Canaan. Other regulations, such as that of tithing, are further instituted in the 26th chapter. 26 also contains a veiled rebuke from Moshe to the previous generation as he points out how good the land was, just as Abba YHWH commanded but this was not accepted as fact by Israel.
As 27 opens, the Israelites will then hurl blessings from Mount Gerizim and curses from Ebal, as we spoke at length about earlier. The curses are a re-statement of the prohibitions in the Ten Commandments. The blessings for obedience then follow suit in chapter 28 and a very extensive category of curses for disobedience follows for the rest of that chapter. Chapter 29 begins with Moshe on a hopeful note, restating how Abba YHWH has been with them all even while being chastised, to get ready for this great moment of entering the Promised Land.
Nitzavim means “you stand” and it begins with more warnings for the price of disobedience. This is literally the beginning of the end of Israelite wandering and Moshe’s own life, so it is critical that every opportunity be taken to explain Israel’s responsibilities to them. This is an abnormally short portion.