Nigeria is made up of four main geographical zones:
- Coastal Region
- The Forest Region
- The Semi-savanna Region
- The True Savanna Region
This zone is found in the empty lowland along the coast, which runs from West to East. This zone experiences heavy rainfall and its vegetation is made up of swamps due to many rivers and creeks in the area.
The Forest Region
This zone experiences heavy rainfall and the vegetation is made up of mostly thick forest. The zone is sub-divided into Tropical rainforest, Swamp Forest, and High Forest vegetation. This region is indeed fertile and very good for the production of trees like Iroko, Obeche, Walnut, etc.
The Semi-Savanna Region
This is the transitional belt that lies between the forest zone and the true savanna zone. The zone is found in the north with little supply of rainfall. The zone is characterized by the production of both trees and grasses.
The True Savanna Region
This zone is found in the Sahara desert. The zone is known for the production of luxuriant grasses and few trees. The major crops in the zone are rice, maize, beans, millet, onions, and sugar cane.