DF2014 Talk:Farm size calculations
Average farm yield
The page reports average of 4.7 plants per tile for legendary farmers; added by researcher NW_Kohaku in 2015.
This doesn't seem to correspond to Blue Dwarf's testing in 42.06, which shows 3.1. With fertilization it doesn't correspond at all; claiming consistent 8-9 yield, while Blue_Dwarf's newer analysis claims only 3.3%-0.9% as chances for getting those stack sizes.
As such, I suspect the numbers have become wrong. While multiplication is trivial, conflicting information might mean there should be some .47 confirmatory testing. If so, we'd need to keep track of methodology here, at least.