This report corresponds to the 2020 Output n° 5: “Improved method for soil carbon monitoring (French case)”. It concerns the Work Package 2 “Developing and implementing an action plan with demand owner 2, Nataïs, Gers, France” and to the Task 2.2. in which deployment of SAFYE-CO2 soil carbon method was continued and a comparison initiated with other carbon monitoring methods. The report will present the results obtained on one farm from the Nataïs network. First, we present the study area along with the primary objective of the task. Second, we describe the carbon monitoring methods as well as their differences and similarities. Third, we present the results for each carbon monitoring method outputs. Finally, we will discuss these results with respect to their differences and similarities.