Summary
This large-scale geospatial study, published in Nature in 2021, investigated the soil-to-people pathway of mineral micronutrients across sub-Saharan Africa, with a focus on countries such as Ethiopia and Malawi. By integrating soil, crop, and human nutritional data, the GeoNutrition project assessed whether soil mineral status is a reliable predictor of dietary micronutrient deficiency in rural farming communities. The work provides spatially resolved evidence that is relevant to targeting agronomic biofortification and fertilisation strategies to address hidden hunger.
UK applicability
The study is conducted in sub-Saharan African contexts with limited direct applicability to UK farming conditions; however, the soil-to-people conceptual framework and geospatial methodology are relevant to UK researchers and policymakers concerned with selenium and iodine deficiency in British soils and their downstream effects on food quality.
Key measures
Soil mineral concentration (mg/kg); grain mineral concentration (mg/kg); human blood/serum micronutrient biomarkers (e.g. selenium, zinc); geospatial mapping of nutrient deficiency
Outcomes reported
The study mapped soil, crop, and human blood micronutrient concentrations across large geographic areas, examining the extent to which soil mineral status predicts nutritional outcomes in rural populations. It likely reported associations between soil selenium, zinc, and other mineral concentrations and corresponding levels in staple crops and human biomarkers.
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