PhytOakmeter (www.phytoakmeter.de) is a field platform using the Quercus robur oak clone DF159 outplanted since 2010. This platform is used to monitor the impact of climate change and land use management on the soil - plant - interactor complex. Sites from PhytOakmeter are located either in forest or grassland habitats and represent a wide range of environmental contexts with specific stressors. All sites are equipped with loggers measuring air- and soil temperature and soil humidity. Soil cores have been collected to analyze their chemical and physical characteristic.The FBOL plot in Toulenne (France) started in 2014 with 13 oak trees outplanted over a 40m x 40m grassland plots. Soil and air temperature were measured since 2018, soil moisture was measured since 2019, and soil chemistry was assessed in the bulk soil and the root-affected zone of trees in 2016, 2018 and 2022. Soil porosity and texture were evaluated in 2022.