Improving Maize Productivity Through Soil and Plant Testing
A case study from Central Malawi demonstrating how soil chemical analysis combined with site-specific fertiliser recommendations increased maize yields by 28% while reducing input costs.
Case Study: Improving Maize Productivity Through Soil Testing
Location: Central Malawi
Approach: Soil chemical analysis combined with site-specific fertiliser recommendations
Outcome
- Maize yields increased by 28% compared to farmer practice
- Nitrogen and phosphorus application rates reduced by 20%, lowering input costs
- Improved nutrient balance and soil pH stability observed after two growing seasons
Impact
Farmers achieved higher yields with lower fertiliser expenditure, improving net returns and long-term soil health.
Key Lessons
This case study demonstrates the value of evidence-based fertiliser management. By investing in soil testing before the growing season, farmers were able to target their fertiliser applications precisely, avoiding both under- and over-application. The result was not only improved productivity but also a measurable improvement in soil health indicators over two seasons.
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