Since the classification system was different in most of the original input data we first describe the reclassification of grid cell–based (section 2.2.1) and unit level–based (section 2.2.2) input data. By combining these reclassified harvested area statistics, we compiled crop calendars at ...
For this reason, the database includes a classification of the study locations as either R, PU or U. There were minority of cases where a description of the field location as either R, PU or U was included in the source articles. In such cases, the information was taken directly from ...