On Sun, 4 Mar 2007 17:13:05 -0600, "JohnS" wrote:

Why remove them? They rot into humus under the cover of topsoil, good for
the grass.

It takes both carbon and nitrogen to create humus, or as it's known
the finished product of compost. The bark will take too much nitrogen
out of the soil and the turf will suffer. I'd say to rake them away
and put them on the soil where garden or landscape beds are located.