Fertilizing cassava improves productivity and fulfills the rising demand for food, feed or raw materials in processing industries. For cassava field crops, Scientists Adiele et al. determined crop growth dynamics, NPK demand, and nutrient allocation to organs. They developed nutrition indices for N, P and K using a “dilution curve” approach. Their novel insights help to identify sustainable management practices to optimize fertilizer application, develop nutrient-limited crop models and improve cassava production.