I do not know the exact number, but it is not very far before you reach the subsoil.
1.7 (you can buy topsoil from teal turf)
Grass typically needs about 6 to 8 inches of topsoil to thrive.
There are 764.554858 liters in a cubic yard of topsoil (or anything else).
That would depend on the density of the bags of topsoil.
The sea is 27.9 kilometers away from the source of lava. (9.3 km/hr x 3 hrs = 27.9 km)
Almost exactly 2.00 cubic yards for every inch of topsoil depth.
A lot
Some good brands of topsoil include but are not limited to Miracle Grow topsoil, Black Magic topsoil, Earth Grow, and Scott's Premium topsoil to name a few.
Topsoil is not a mineral, but it contains minerals.
topsoil
A truck load of topsoil
topsoil