I took it to mean whether or not the said nutrients move freely through the plant or not, I could be mistaken
lime73: yeah you have those pics... so do you post asking whats up when your leaves change color? probably not because you have those pics, and the grow bible apparently! I just find it to be a simple way of helping out, rather than go into detail myself, I enjoy helping new growers and it was pics like that that helped make make sense of issues like this. my absolute best advice for new growers is to download some grow videos, get high and watch the shit out of them.
btw the other pic I post up everywhere is to help people that don't know when to harvest, and don't we see a lot of them?