Planting trees for ammonia mitigation should be used as a complimentary measure for reducing on-farm emissions of ammonia to the atmosphere. It takes time for the young trees to mature to the point where the canopy closes and the maximum ammonia capture is reached. There are more tried and tested methods for reducing ammonia emissions on the farm which include housing technologies (e.g. ventilated manure belts), storage covers, and spreading manures & slurries by injection or trailing shoe method. These types of measures should be applied in the first instance when considering managing nitrogen losses from farm practises.