| http://www.w3.org/ns/prov#value | - Assuming you are going for an extremely wholewheat approach - using the whole grain, including bran and germ - each tonne of flour pretty much equates to a tonne of wheat (in British commercial milling 4.5 million tonnes of flour is made from 5.5 million tonnes of wheat every year), then you need 297 square metres of wheat to provide your family with bread.
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