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. Chemists and engineers from the University of Glasgow have found a way to produce molecules of nitrate – an important nutrient for plant growth – using just sound waves, water and air. They say their prototype process could be scaled up to enable individual farmers to make their own fertilisers on demand in the future.