• Data reference period
• Geographic localization (Members States of the European Union)

• ANNUAL WORK UNIT (A.W.U.):  A unit of measure corresponding to the work performed by 1 person on a full-time basis over a year, measured in hours (1 AWU = 240 working days of 8 hours each).
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).
• AGRICULTURAL HOLDING:  Technical-economic unit that uses common production factors such as labour, machinery, facilities, land, among others, fulfilling the following four conditions: 1) yield agricultural products or maintain, in good agricultural and environmental conditions, the lands that are no longer used for productive purposes; 2) reach or exceed a certain size (in area or number of animals); 3) be subject to a single management; 4) be located in a well-defined and identifiable area.

Volume of agricultural labour force/ Number of agricultural holdings