Methodology for EO-assisted maps of nutrient requirements and of yield

This document presents the spatialized recommendation methods of nitrogen (N) fertilization using satellite remote sensing measurements. The Sentinel 2 mission offers a great potential for improvement thanks to 1) high temporal repetitiveness which makes it possible to follow the vegetation during the critical stage revealing the soil / water / nitrogen interactions on the development of the vegetal cover and thus to appreciate the potential of production and the limiting factors, 2) its high spatial resolution (10m) which is adapted to the spatialized application scale of fertilizers and 3) an interesting spectral content for the characterization of the nitrogenous state of plants. Seven methods were developed and applied to the wheat fertilization.