The daily requirement is 125g.
The chemical yield is 250g/m2. Note that this is for Britain, which is not a good climate for soy.
The organic yield is 200g/m2.
The seeding rate is 120,000 seeds per acre. As each soybean weighs around 0.15g, that would be around 18kg/acre, or 5g/m2.
The land requirement is 234m2.