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Foliar diagnosis allows you to control crop nutrition during vegetation (deficiency, balance, excess, ratio of nutritional elements), contributing to a high-yield and high-quality production. As some studies on potato, tomato, sugar beet and grapevine have shown, analysing the plant petiole can be more informative than analysing the whole plant.

This type of analysis also offers the opportunity to make a precise annual or multi-annual assessment of the impact of the climate, the actions carried out on the plot (fertilisation, treatments, pruning, etc.), the participation of the soil and subsoil, and any possible blockage.

Performing this analysis helps to establish the level and efficiency of assimilation of fertilising elements by the plant in relation to the physical characteristics of the soil and the rainfall. It will also identify physiological imbalances and causes of crop weakening, thus reducing the risk of parasitism and the use of phytosanitary products. You can then adjust a nutrition strategy over time, by improving water management and fertilisation to obtain quality harvests. A deficiency or an excess can be diagnosed by comparison with a healthy plant.