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| Subject | English | Norwegian Bokmål |
| environ. | irrigation canal A permanent irrigation conduit constructed to convey water from the source of supply to one or more farms | vanningskanal |
| environ. | irrigation farming Farming based on the artificial distribution and application of water to arable land to initiate and maintain plant growth | vanningsjordbruk |
| environ. | irrigation system A system of man-made channels for supplying water to land to allow plants to grow | vanningssystem |
| environ. | trickle irrigation Method in which water drips to the soil from perforated tubes or emitters. This irrigation technology is water conserving compared to flooding, furrows, and sprinklers | dryppvanning |