Teruo Higa
Effective Microorganisms — a defined co-culture of lactic acid bacteria, yeasts and phototrophic bacteria, applied as a farm input.
The record
- Standing
- foundational work
- Based
- University of the Ryukyus · Okinawa, Japan
- The mix
- Lactic acid bacteria, yeasts and phototrophic bacteria, applied together rather than singly — the central claim being that the combination behaves differently from its members.
- Dates
- The optimal mix was settled in 1980 and named EM; commercialised in 1982.
- The route in
- Early research in horticulture, and health problems caused by agricultural chemicals, pushed him toward looking for a safer input.
- Reach
- EM technology is reported in use in over 130 countries, across agriculture, livestock, river purification and waste treatment.
Standing is this studio’s placement of the work, not a ranking of the person, and it is the one line here that is a judgement rather than a cited fact.
The work
Higa was a horticulture researcher at the University of the Ryukyus in Okinawa when he arrived at the combination that became EM. The premise is co-culture: lactic acid bacteria, yeasts and phototrophic bacteria maintained together in a stable, low-pH consortium that can be extended by the user and applied to soil, to compost, to livestock bedding, or to water.
It was settled as a formulation in 1980 and commercialised two years later, and it is now the most widely distributed microbial input in the world, used across more than 130 countries and well beyond agriculture — river remediation and waste treatment among them.
The efficacy literature on inoculants of this kind is uneven and results are strongly context-dependent, which is worth knowing before a farm budgets for it. What is not in dispute is the influence: EM is the reference point every later microbial input is described against.
Where to read them
Sources for this record
Corrections
This record was assembled from the sources above, and nothing in it was inferred to fill a gap. If it is about you and it is wrong, or you would rather not be listed, write and it changes.