There are different ways to design a ground solar mounting systems. The standard way is to mount the solar racking to open filed with ground screw and fix solar structures above the ground screws. Or make concrete blocks on the filed and then fix the solar brackets on the blocks. The solar mounting structures are designed with angles according to the solar angle, and most of the solar structures are made of high quality aluminum. The solar panels are installed on top of the structures.
Another way to installed solar panels on ground is to make a pole mounted system. With solar pole mount brackets, the solar panels are installed above it.