No that is not my point. The required soil biology and envrionmental factors are varied based on source and type of fert used. My point is the use of manures as a substitue for synthetic fert is not "green" as one might think. The source of N and P for that matter come from synthetic fert at some point. Now that is not to say that the luxury of a nice lawn is best acquired via a reused source of N and P via manures from a more important practice of food production. I just think people should have the whole picture.