Tropical Rainforest
Rainfall Above 2,000 mmElevation Lowland, mostly under 300 m
Soils: Deep but leached forest soils; fertile where well managed
CocoaOil palmRubberPlantainKola nutYamCassavaRice
Nigeria's humid forest belt and its cocoa and oil-palm heartland — cocoa is the country's top agricultural export, alongside rubber, plantain and tree crops.
Where: Ondo, Ogun, Oyo, Ekiti, Edo, Cross River, Imo, Enugu & the South-West/South-East
Mangrove & Coastal Swamp
Rainfall Very high, 2,000–4,000 mmElevation Sea level, tidal
Soils: Waterlogged, saline mangrove mud
Oil palmRaffiaCoconutSwamp riceCassavaFisheries
Brackish delta wetlands — cultivation is limited to stabilised, non-saline land (swamp rice), but the zone is strong in oil palm, fisheries and aquaculture.
Where: The Niger Delta — Delta, Bayelsa, Rivers, Akwa Ibom and coastal Lagos
Guinea Savanna (Middle Belt)
Rainfall ≈1,050–1,315 mmElevation 200–600 m (Jos Plateau higher)
Soils: Loamy savanna soils, good for mixed cropping
YamMaizeCassavaRiceSoya beanGroundnutSheaGingerCashew
Nigeria's food basket — yam, grains and legumes, with shea and locust bean trees, ginger (southern Kaduna) and a fast-growing cashew frontier.
Where: Kaduna, FCT, Nasarawa, Benue, Kogi, Niger, Plateau, Taraba
Sudan Savanna
Rainfall ≈650 mmElevation 300–600 m
Soils: Sandy, free-draining savanna soils
SorghumMilletGroundnutCowpeaCottonSesameMaizeWheat (irrigated)
The dry north's grain, legume and cotton belt with a short single rainy season — sesame and groundnut are major non-oil exports.
Where: Kano, Katsina, Sokoto, Zamfara, Kebbi, Jigawa, Bauchi, Gombe, Yobe, Borno
Sahel Savanna
Rainfall Under 700 mm, erraticElevation Low plains, dune-prone
Soils: Sandy, slightly alkaline, saline in places
MilletCowpeaLivestockGum arabicIrrigated vegetables
Nigeria's driest margin — pastoralism and irrigated farming around the Lake Chad basin, with gum arabic and livestock dominant. Cultivation generally needs irrigation.
Where: Lake Chad margins — far-northern Borno and Yobe