The most land-efficient crop you can grow in the US is corn, at 15 million calories per acre. (In warmer climates sugar cane edges it out with about 17 million calories per acre). Your one-acre farm could feed about fifteen people, not one thousand, and that's if people could live on corn alone.

If you want to improve agricultural technology I'd suggest finding and talking to some farmers and finding out what they want, rather than starting from a clean sheet and an idea of what a science fictiony farm ought to look like.