Turn on, tune in, crop out: £20 device uses ultrasound to produce fertiliser
Published: 23 June 2025
A £20 device which makes fertiliser by treating water with ultrasound could transform agricultural supply chains in remote areas, its inventors say. The prototype process could be scaled up to enable individual farmers to make their own fertilisers on demand in the future. That, in turn, could reduce the carbon footprint of the agriculture sector, which currently relies on complex, expensive, and fossil-fuel driven factories for large-scale production of fertilisers like ammonia.