The present paper describes the role of organic farming measures in the safeguard of the High Nature Value in Tuscany. Using National Census of Agriculture data (2010) the probability of program enrolment has been computed, through a Probit model. After, a Propensity Score Matching approach has been implemented, to verify what would have happened if treated farms would not have participated to the program. Hence, a control group with similar characteristics as the treated one has been built. Finally, the Average Treatment on the Treated has been computed, revealing organic farming measures have not statistical relevance in enhancing biodiversity.