How can farmers sustain themselves all year with food if you can only harvest once a year?

Question

How can farmers sustain themselves all year with food if you can only harvest once a year?

In: Planetary Science

Answer 1

It’s been argued that growing wheat is the single greatest return on investment in human history, in terms of the number of grains you harvest compared to the number you plant, and the season only takes 3 months.  And wheat keeps well in proper storage.