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

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.