I doubt that you missed it, I was referring to me asking what ManO'Green's 40% runoff figure meant. I could not understand how it was possible to get 40% waste by fertigating to only 20% runoff. Turned out that I misunderstood, he was comparing two different fertigation regimes, and I thought he was referring to the percent runoff in the new regime, not comparing with another one. The whole thing is put to bed now after MOG explained what the 40% meant.
I regret my initial question because it turns out to have accomplished bugger all but me finding out that I am taking this stuff too seriously for my own good.