Why Crop Rotation Matters in Africa

Research-backed benefits from African field trials across 20+ countries.

🌱 Nitrogen Fixation

Legumes like cowpea (32 kg N/ha), soybean (80 kg N/ha), and groundnut (67 kg N/ha) fix atmospheric nitrogen into soil — reducing or eliminating the need for expensive N fertilizer in the following season.

🐛 Pest & Disease Breaks

Many pests and pathogens are crop-specific. Planting different families in sequence starves pest populations. A simple maize–cowpea rotation can reduce Striga weed infestation by up to 90% within two seasons.

📈 Yield Improvements

Field trials across Africa show maize after soybean yields 52% more than continuous maize. Wheat after chickpea yields 30% more. These are documented averages — better soil structure and N availability drive the gains.

💰 Lower Input Costs

A season of legumes can save 40–60 kg/ha of urea in the next cereal crop. At $0.50–0.80/kg for fertilizer across Africa, that's $20–50/ha saved every other season — significant for smallholder budgets.

🌊 Soil Structure

Alternating deep-rooted crops (cassava, pigeon pea) with shallow-rooted cereals breaks hardpan layers, improves water infiltration, and accesses nutrients at different soil depths.

🌍 African Research Base

The rotation data in this tool draws on studies by Dakora, Sanginga, Vanlauwe, and the IITA/CIMMYT African trial networks spanning Ethiopia, Kenya, Nigeria, Burkina Faso, Malawi, Zambia, and more.

African Crop Rotation Planner

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