I have a front lawn (only about 60 x 60) which is basically all weeds.
The soil is fairly poor in some areas with some gravel in places
where they probably had a bed for something or another years back. Is
it OK to just till the entire area without actually digging up any of
the grass before I start? I assume that all of the weeds will remain
in the soil and I don't know if this is a good thing or something to
avoid.