600g/m2= 600 grams every square meter...whether its 30 SOG plants, or 4-5 biggins...Grown correctly with nutes n such, you should yield AROUND 600 grams for each square meter of canopy

but like jimmy said...go READ! there are countless hours of information on this board..start with the stickies in the Growing FAQ section. We aren't gonna do everything for ya...I have read your posts on other threads too, and you are asking alot of basic questions that if you took the initiative to read, you wouldn't need to ask us. I would guess you haven't read much if you haven't even gotten to yield descriptions.
That being said, we will gladly answer any questions you have, provided we dont get the impression you are using us as a 1-800 help line
whiskeytango