Water‑based iron catalyst pilot raises crop quality and cuts fertiliser use

During a three‑month pilot that ran from February to April 2025, LIFULL Agri Loop, Itochu Techno‑Solutions and NEXT AGRI WORK treated spinach beds with the water‑based agent inside NasuCon Valley, the country’s largest living lab. The harvest saw a drop in nitrate nitrogen by 55 per cent, sugar content rose by 11.4 per cent, and yields leapt by 70 per cent against standard practice. Local restaurants have already adopted the sweeter leaves as a Nasu‑only staple.

Oxidation is essential for life, but an excess of it will strip organic matter, acidify fields and leave microbes with little to feed on. LIFULL’s LAL catalyst introduces microscopic iron particles that capture surplus oxygen radicals before damage sets in, keeping pH near neutral, moisture higher and nutrients locked in the root zone.

“Healthy soil is the bedrock of food security and rural vitality,” said Takashi Inoue, who heads the NasuCon Valley Association overseeing the trial. Buried sensors report nutrient levels and pH in near real time, and a cloud dashboard helps growers fine‑tune irrigation and catalyst dosing each week. This reduces waste and raises consistency.

With the success of the first pilot, the partners will move on to test salad greens, rice and strawberries through 2026. Early simulations suggest rice paddies could emit less methane because stronger roots need fewer anaerobic microbes. To spread risk, the trio of partners is drafting a service model in which farmers pay a modest fee and then share the premium that higher‑grade produce commands.

Multi‑year trials across different soils remain the next hurdle, and the first‑season data will be submitted to the Journal of Environmental Quality later this year. If the wider tests hold up, they will eventually contribute to the national goal to cut chemical‑fertiliser use 20 per cent by 2030.