How might a shortage of food affect population growth?

a food shortage could effect the population in many ways; first, when the citizens already living there notice the food shortage, they'll be the first to move away, which is one way the population will decrease. Then, people won't move to an area with a food shortage, which will lead the population to stay at the same rate, and won;t allow the population to grow, and lastly, the economy will suffer if their is a food shortage; especially food markets, and people will become aware that this area is short on food.

Explanation:

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances