Imagine if a country so small produces/exports so much food, just how "easy" it would be for the whole world (up to maybe 50b) be all fed and happy just farming

Imagine if a country so small produces/exports so much food, just how "easy" it would be for the whole world (up to maybe 50b) be all fed and happy just farming. Sure they use nutrients for industrial farming but I remember in the past we uses to farm just fine without nitrogen.