I would like to know if that 70% of farmlands also correspond to 70% (or more) of the output. I am skeptical that is the case - but I might be wrong... I would

I would like to know if that 70% of farmlands also correspond to 70% (or more) of the output. I am skeptical that is the case - but I might be wrong... I would like to see the output figures in any case.