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Poor soil health associated with crop production with little or no additions of organic or mineral nutrient resources is an underlying cause of low crop productivity and food insecurity in sub-Saharan Africa (SSA). There is need to support smallholder farmers to intensify crop production mainly by increasing the use of fertilizers and improved crop varieties, while managing organic resources to maintaining soil fertility. Efforts are also required to nutrient management recommendations to ensure that agronomic and economic efficiency is optimized for highly variable soil fertility conditions. We used the Nutrient Expert for Hybrid Maize (NE) decision support tool to explore the potential impact of various options for maize production intensification for various categories of farmers in Siaya, Western Kenya, and Wedza, Eastern Zimbabwe. Nutrient Expert (NE) applies the site-specific nutrient management concepts to develop …