Data for: Determinants of yield variation of organic cereals in productive agricultural areas

This dataset contains data on yield, crop management, field measurements and field conditions for organic spring barley and winter wheat fields in agricultural areas of southern Sweden from 2020. The data was collected to determine yield limitations for these two crops and the relative importance and relationships between management (for example fertilisation, weeding, soil cultivation, preceding crop, crop rotation, time since conversion to organic farming) and its effects on various measurement of the field state (for example nutrient levels, weed, diseases) as well as soil characteristics and weather. The farms (56 in total) were all organically certified and located within the regions of Skåne, Halland and Västergötland, one field per farm and crop was visited. Field visits were done to take measurements in the field, these included plant nitrogen levels (through SPAD), weeds, pests and diseases measured during the growing season, and soil samples gathered in the end to analyse phosphorus and potassium levels, as well as pH and soil organic matter content. This data was gathered in four 2x2 meter observation plots in each field, and the data present averages across these four plots. After this the farmers were contacted to get information about the field's management operations and yield. Additional contextual data was gathered from landuse, weather and soil maps, averaged for the entire field and/or summed over time. Included in the dataset is both the original data and also values that have been regionally group mean centered, as used in the related publication. The data is split between spring barley (SB) and winter wheat (WW) and each row represents one field, 52 fields with spring barley and 29 with winter wheat.