I'm trying to figure out how big a martian greenhouse would need to be to feed one person or supplement a significant portion of their diet.
Question: What is the maximum amount of Calories one cubic meter greenhouse in optimal conditions can produce per day?
Volume does not include environmental regulation systems and we assume the greenhouse, no matter the size, is at the ideal temperature, pressure, and atmospheric conditions.
Advanced farming techniques are used (aeroponics + vertical farming probably)
Genetically engineered plants may be used as long as they exist today (even if they're still in labs)
We've got a nuclear reactor/ large solar panel farm ensuring energy for lighting is available 24/7 should it be needed