Deuteronomy 11:10

For the land to which thou goest in to possess it is not like the land of Mizraim, from whence you have come, in which thou didst sow thy seed, and water it thyself as a garden of herbs;

For the land… After establishing that you are obliged to keep His commandments, the meaning of this passage is: For the land is not like the land of Egypt; rather, it has a need for God to set His eyes upon it all year long. (This latter expression is a figure of speech, connoting someone who watches for whatever is needed, and provides for everything in its proper time.

[FOR THE LAND, WHITHER THOU GOEST IN TO POSSESS IT, IS] NOT AS THE LAND OF EGYPT — “but better than it. This assurance was given to Israel upon their departure from Egypt, for they said, ‘Perhaps we will not come to a Land as good and beautiful as this’ [hence they were assured that the Land whither they were going was far better than Egypt]. One might, however, think that Scripture speaks in disdain of the Land, and Moses said thus to them: ‘It is not as the land of Egypt — but worse than it!’ Scripture states, therefore, Behold, Hebron ‘nivnethah’ (was built) seven years before Zoan in Egypt. One person [Ham] built [both] of them. Usually, a person builds the better city first and afterwards the inferior one etc.” This is Rashi’s language from the Sifre. 37. And he further quoted what the Rabbis have interpreted in the Gemara of Tractate Kethuboth with a different point of view: “Is it possible that a man would build a house for his younger son first and afterwards for his elder son? But the meaning of the expression, Behold, Hebron ‘nivnethah’ seven years is that it was ‘built up’ superior to Zoan sevenfold.”
In line with the plain meaning of Scripture the verse here is said by way of the warnings [with which Moses has been admonishing the Israelites]. For he said to them, “Therefore shall ye keep all the commandments etc. that you may possess the Land etc. a Land flowing with milk and honey, since G-d will give the rain of your Land in its season and the Land shall yield her produce. But know you that it is not like the land of Egypt [where one can find sufficient water] to irrigate it with his feet from the streams and the pools as a garden of herbs. Instead, it is a Land of hills and valleys, and drinketh water as, the rain of heaven cometh down, not in any other way. Therefore it requires that G-d care for it always by giving it rain because it is a very thirsty Land and needs rain all year. If you transgress G-d’s Will and He does not care for it [the Land] with ‘rains of benevolence’ it is a very bad one, it cannot be sown, nor beareth, nor any herb groweth on its mountains.” All this he reviews and explains in the following section, that if ye shall hearken diligently unto My commandments, then I shall give the rain of your Land in its season, the former rain and the latter rain always, and if you will not listen He shall shut up the heaven …

כי הארץ אשר אתה בא שמה לרשתה לא כארץ מצרים היא, This is part of the structure of these portions of the Torah, i.e. you need to observe the commandments of the Lord your G’d for the land of Israel cannot be compared to the land of Egypt, being superior in quality to the land of Egypt for the people who observe G’d’s laws. At the same time, it will prove inferior to the land of Egypt for people who do not observe G’d’s laws. Proof of this can be seen already in the fact that the land of Egypt enjoys constant irrigation from the river Nile, does not need rain, whereas the land of Israel is totally dependent on rainfall at the proper time of the year. The Egyptians enjoy their irrigation regardless of their being G’d fearing or not. Their staple foods are assured. The land of Israel, on the other hand, seeing that

עיני ה' אלוקיך בה, being constantly under the detailed scrutiny of the Lord your G’d, מרשית שנה ועד אחרית השנה, to ensure that you will have the necessary rainfall at the right time in the right amount, makes you aware of the need to conduct yourself so that He approves of you.

כי הארץ אשר אתה בא שמה לרשתה לא כארץ מצרים היא, which does not require rainfall.

לא כארץ מצרים, “not like the land of Egypt; that land is a flat land lacking mountains and therefore enables its inhabitants to draw water from the Nile river through digging canals to the land surrounding the river. The Jewish people when in their ancestral land, by contrast, will have to depend on the rain to irrigate their land. As a result they will realise the need for their G–d being well disposed towards them as else He might withhold the required rainfall at the appropriate time for securing their success in the fields. Your fulfilling His commandments at the appropriate times, will insure that He grants rain at the appropriate time in the appropriate quantities.