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).
The sea is 27.9 kilometers away from the source of lava. (9.3 km/hr x 3 hrs = 27.9 km)
That would depend on the density of the bags of topsoil.
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