• Data reference period
• Geographic localization (Portugal)

• 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.
• 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).
• UTILISED AGRICULTURAL AREA:  Area of the holding which includes arable land (cleared and under cover of forest stands), family vegetable garden, land under permanent crops and permanent pasture.
• IRRIGABLE AREA:  The maximum area in a holding that could be irrigated if necessary by the holding's own equipment and with an amount of water normally available.

(Irrigable utilised agricultural area/ Utilised agricultural area)*100