This data set (TRIAL_SITES) is the starting point of a larger data set that contains data and information used in the study “Yield development of German winter wheat between 1958 and 2015” in the Project “Data-Meta Analysis to assess the productivity development of cultivated plants” funded by the DFG. This starting table contains geographical and environmental information about the experimental sites at which the N-fertilisation experiments were conducted. Amon other topics, this data set can...