For the land, where you go in to possess it, is not as the land of Egypt, from where you came out, where you sowed your seed, and watered it with your foot, as a garden of herbs:
All Commentaries on Deuteronomy 11:10 Go To Deuteronomy 11
George Leo Haydock
Gardens. Hebrew, "where thou didst sow the seed, and water it with the foot, as a garden "by means of various machines or wheels, which were turned by the feet. (Philo)
Solinus (ii. 22, 36,) takes notice of this inconvenience in Egypt. The country is watered only by the Nile, which overflows for six weeks, about the beginning of June. Various canals or reservoirs are formed to preserve a sufficient supply of water during the remainder of the year. Pliny ( xviii.) observes, that "if the Nile rise less than 12, or more than 16 cubits high, famine is inevitable. "(Calmet) See Genesis xlii. 3.
Prince Radzivil saw the canals of Egypt, which the people said had been dug by the Hebrews. Augustus ordered his soldiers to clean them out. (Suetonius, c. 18.)
After the seed was committed to the earth, it was necessary to water it frequently, as the sun would harden the soil too much. No rain falls in that part of Egypt where the Hebrews had dwelt, according to many respectable authors; (Tirinus) or at least what little may fall is not sufficient to keep the earth moist. Proclus allows that some showers are felt in Lower Egypt, which lies nearest to the Mediterranean Sea; and travellers often take notice of them, in their journeys from Alexandria to Memphis. Yet the country in general is destitute of this advantage, Zacharias xiv. 18. (Lloyd) (Haydock)