After the Second World War, trees were systematically eliminated from the fields to intensify crops: agriculture became artificial. However, just like natural ecosystems, agricultural systems are dependent on a minimum biodiversity in order to optimize production and ensure their sustainability as they are confronted to disturbances (diseases, invasive species, physiological stress, etc.). This observation is all the more valid in a context of proven climate change, where the extremes are accentuated.
Agroforestry, by multiplying plant strata, makes it possible to increase diversity in terms of species, habitats, ecological functions and occupation of space, in order to improve the capture, fixation and resource recycling. It is now restoring the tree to its ancestral place in cultures. It is a method of planting rows of trees in the heart of agricultural plots. The challenge is to play on the possible interactions between cultivated plants and selected rare species, but also with the animals bred to optimize and diversify its production by limiting inputs.