I have a 2000 plus sq ft backyard that need grading to bring it to an
even slope. Probably 5 to 10 cu yds of dirt spread by a bobcat will
do the job. The low spots to be filled in will be no more than one or
two inches of dirt. Most of the lawn will not need any dirt fill.

The dirt gone pretty hard over the years (24) and the grass OK. The
weeds there are mostly dandelions with some stinkweed and assorted
broadleaves. They are not that many I can easily remove them by
applying killex and some hoeing as I had been doing every year. They
do keep coming back because my lot is next to a school field cum
public park.

When I built the house, yup I was coordinating the tradesmen and did
some sweat equity myself, I didn't have enough money to grade this
part properly and its uneven in some places and lumpy in other spots.
I had held off building the rear deck because all this time I did not
want to have the deck in place before the bobcat can do its work.
Talk about procrastination.

The question is can I just spread the dirt over the grass and grade
the slope or do I need to dig up all the old grass first. As far as
I am concerned the present grass species is perfectly OK since
whatever species of grass I put in the present one which is the same
as that of the school field will take over anyway.