look do a lot more reading, its not the strain the determines the actual amount of green you end up with that is smokeable. its the conditions its grown under. the easier it is to grow the harder it is to screw up and end up with a bust harvest. if you grow it right you could end up with more or less depending on your cycle lengths, the light provided, and other factors of growing such as nutrients provided, amount of light given. But strain overall has expected yields, such as the one which you provided, and this is supposed to be a baseline to know the density in which you can judge your plants outcome. You can grow the strain with the highest expected outcome per meter squared(m2) and mess up the growing ending up with a pretty much useless male plant, or with a quarter of the expected harvest.