Agro-Ecological Zones (AEZs) in Kenya
Kenya is characterized by diverse agro-ecological conditions, which have been classified into eight AEZs based on altitude, rainfall, temperature, and soil characteristics. These zones influence agricultural practices and crop suitability.
1. Sub-Humid to Semi-Arid Tropical (LM1, LM2)
- Altitude: 0-1,000 meters above sea level (masl)
- Rainfall: 500-1,000 mm per year
- Temperature: 22-29°C
- Soil: Sandy and well-drained
- Suitable crops: Maize, sorghum, pearl millet, beans, cowpeas, cassava
2. Humid Tropical (UM1, UM2, UM3)
- Altitude: 500-2,000 masl
- Rainfall: 1,000-2,000 mm per year
- Temperature: 18-22°C
- Soil: Clayey and well-drained
- Suitable crops: Tea, coffee, pyrethrum, bananas, maize, beans
3. Sub-Humid Tropical (MH)
- Altitude: 1,000-2,000 masl
- Rainfall: 750-1,250 mm per year
- Temperature: 20-24°C
- Soil: Sandy and well-drained
- Suitable crops: Maize, potatoes, wheat, barley, beans
4. Temperate (LT)
- Altitude: 2,000-3,000 masl
- Rainfall: 1,250-2,000 mm per year
- Temperature: 15-20°C
- Soil: Clayey and well-drained
- Suitable crops: Wheat, barley, oats, potatoes, apples
5. Semi-Arid Tropical (S1, S2)
- Altitude: 500-1,000 masl
- Rainfall: 400-800 mm per year
- Temperature: 26-32°C
- Soil: Sandy and poorly drained
- Suitable crops: Maize, sorghum, pearl millet, beans, cowpeas
6. Arid Tropical (AS1, AS2)
- Altitude: 0-500 masl
- Rainfall: 200-500 mm per year
- Temperature: 30-34°C
- Soil: Sandy and poorly drained
- Suitable crops: Nomadic grazing
7. Montane Humid (UH)
- Altitude: 2,000-3,000 masl
- Rainfall: over 2,000 mm per year
- Temperature: 12-18°C
- Soil: Clayey and well-drained
- Suitable crops: Tea, coffee, pyrethrum, bamboo
8. Montane Forest (Mf)
- Altitude: over 3,000 masl
- Rainfall: over 2,000 mm per year
- Temperature: 10-16°C
- Soil: Clayey and well-drained
- Suitable crops: Forestry
Implications for Agriculture:
The different AEZs in Kenya influence the suitability of different agricultural practices and crop choices. Farmers must understand the specific conditions of their zone to optimize production and ensure agricultural success.