In its Plan d’Actions Quinquennal 2014-2018 (PAQ), validated by obtaining its State-Region HN approval on September 11, 2014, the Conservatoire d’espaces naturelles de Haute-Normandie included land management in its protection actions as one of the strongest and obviously sustainable tools. It is in this spirit that he has identified natural and semi-natural environments, species and habitats as well as the priority areas to be mastered for the purpose of their preservation and in the general interest.It is stated in this same PAQ that are PRIORITARY:• the calcicultural and sandy slopes of the alluvial terraces for the actions of the CenHN because, in particular, the Seine and Eure Valleys host an exceptional diversity in terms of faunistic and floristic richness (very many protected species, presence of 2 regional endemic plant species, numerous species within range limits, mammarian vegetation formations: Wetland and plantland). the location and quality of wet meadows and marshes of high ecological value are still very poorly known in Upper Normandy. Peat and paraturbous meadows, lean mowing meadows, and acidocline meadows appear to be the rarest. These habitats are seriously threatened with extinction, in a general context of the destruction of high Norman meadows (30.000 ha disappeared between 2000 and 2010).In addition, the network of Conservatoires of Natural Spaces has established a Fund of Dotation within which it can secure any land in such a way as to render inalienable a conservatory vocation of the areas in question. The CenHN may transmit these acquisitions to the Fonds de Dotation des Conservatoires d’espaces naturelles while retaining the mastery of use, management and conservation.