It was based on many years of survey information from several sources and was called “Soil Classification - a Binomial System for South Africa”, known as the “red book”. It uses unique combinations of topsoil and subsoil horizons (layers) to place a soil into a specific soil form.
Antagonist protagonists, the characters roles
The density of the rays.
The angle of the rays on the surface.
Strongest near equator. Most spread out near the poles
