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What area is needed to sustain a person for a year? [closed]

I was wondering, what area space (m²) do I need to plant rice/bean in order to sustain one person for a year?
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926 views

How is nutritional value in fruit and vegetables measured?

We often read in books and Wikipedia that certain fruits or vegetables contain certain amount of vitamins, minerals and other elements. An example can be seen on Beetroot in the box with nutritional ...