Rhodesia used to feed themselves and three other neighboring countries with just what they alone produced. Now Zimbabwe imports 100% of the calories they consume.
Most of that is donated as well.
Africa could feed the entire planet's population and easily have surplus.
If you ever get a chance, stand on the BUS 90 bridge in New Orleans. It's the southern-most bridge over the Mississippi River. Watch and count the bulk cargo barges piled with grain, all on it's way to leaving the US.
The United States could feed the entire worlds population, all 7 billion of them, with the agricultural output of just three states.
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