The US farm belt or Midwest is the worlds largest producer of food. If you mean human food.
Subsistence farming is when farmers grow food to sustain their family. It is a lifestyle of self-sufficiency. The majority of a farmer's diet comes from food that is grown on his or her property.
There are areas in Australia where good farmland is available and where the majority of Australia's foods are grown. However the vast majority of Australia is arid and not suitable for farming in the European sense of the word.
Where are most of the worlds bananas grown
in madagascar
A blight occurring to that crop would cause a food shortage.
They are grown wherever there is a market for them, if the land and climate are suitable.
ice
asia
brazil
Asia, Europe and the Americas. a large majority are grown in California.
The majority of the land in the world is unused. The largest use, 40% of the surface, is a combination of farming and animal husbandry for food consumption.