Another aspect of the future of Agriculture Technology is the way that the land is utilized. Vertical farming isn't a new concept. Ancient civilizations had a type of vertical farming in the form of terraces.
Vertical farming probably will be the future of agriculture. A rule of thumb is that it takes 1 acre to feed a single person. There is 640 acres in a square mile (2.58999 sq kilometers). How can we compress that 1 acre. One way to do it would be to have several crops per year. For instance if you could have 4 crops per year, a square mile could feed 2560 people. Many plants could be grown with a maximum height of 3 feet. Having a building with 10 layers (30 feet) could feed 25,600 people.
Makes you think.