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.
Social, cultural and economic factors influence fertility, mortality and migration rates. Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. Age and sex are main demographic factors that affect the migration.
I believe was the capital of Ancient Greece.
