Summary
This narrative review examines micronutrient limitations as a significant constraint on crop productivity and human nutrition in developing countries, with emphasis on African soils and Ethiopia. The paper synthesises evidence that intensive cultivation, erosion, and unbalanced fertiliser use have depleted soil micronutrient stocks, and argues that integrated agronomic and soil-based strategies are necessary to address these deficiencies. The review concludes that addressing micronutrient deficiencies is essential for optimal crop production and food security in vulnerable populations.
Regional applicability
The paper's primary focus on developing-country soils, particularly in Africa and Ethiopia, has limited direct applicability to UK agricultural conditions, which generally benefit from higher soil micronutrient baselines and more sophisticated nutrient management. However, the review's conceptual framework regarding soil depletion pathways and integrated nutrient management strategies may inform UK policy discussions around sustainable intensification and soil health.
Key measures
Micronutrient deficiency status (zinc, boron, copper); crop yield impacts; human nutritional quality; effectiveness of fertiliser interventions and agronomic practices
Outcomes reported
The review synthesises evidence on the scope of micronutrient limitations in crop production across developing countries, with particular focus on African soils and Ethiopian staple crops. It examines agronomic and soil-based strategies for improving micronutrient availability and uptake to enhance both crop productivity and human nutritional outcomes.
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