I wouldn't think so. It is just for lawns.
It's measured in cubic feet (1.5), but the weight varies somewhat based on how much water has been absorbed. I would guess it is an average of about 45-50 lbs.
By dent you mean a duvet or lowered area? Yes. I had this in a few areas.
Not that I have noticed. But I also used the turf builder to eliminate weeds. Otherwise, there might have been a problem.
I WOULD NOT . I WOULD JUST LAY DOWN REGULAR DIRT. PLANTED SOD LAST YEAR AND JUST PUT DOWN REEG.SOIL AND IT CAME UP GREAT.
I think you mean years? Also, this is not a question, and I don't control how long things remain on the website.
Yes, any humus based natural materials works great or vegetable matter which will break down in a compost bin.