Résumé
Context : agriculture is one of the major cause of the climate change. In France, agriculture is responsible for 19 % of the national GHG emissions caused by 3 gases : N2O (50%), CH4 (40%) et CO2(10%). Agriculture is doubly concerned since it already faces dramatic consequences, due to climate change, like decrease of crop yields. That motivates the transition toward a new agriculture paradigm, known as agroecology. Agroforestry is one of the agroecologic practice, which combines trees and cereal crops. Growing trees and roots will sequester carbon in soils allowing to mitigate the carbon impact of the cultivated parcell. These practices require careful studies of the GHG of the cultivated parcel which would be sustained by new gaz sensor technologies : cheap, robust and sensitive.