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Four Jobs Microbes Do in Soil, and Why Local Ones Win

Dr. Hoon Park, Not stated in this recording · USA (Hawaiʻi)

Part of the full session video: this talk runs from 1:12:43 to 1:26:07. Times below are the video's.

Dr. Hoon Park, under a tent on the skill-share lawn, explains why Microbes (IMO) matter in soil. He says your own local microbes outlast lab-made ones like EM, and goes through four jobs they do: decomposition, catalysis, revitalization (bringing earthworms) and disease suppression. He ends with charcoal as a home for IMO-4, Master Cho's tree seedlings in the Mongolian desert, and his main point: look at the roots and revive the soil.

What they found

The question

Why do microorganisms matter in the soil, and why use your own local ones?

How they tested it

A lecture, not a trial. Park explains that plants can't take in fertilizer (chemical NPK or organic, like chicken manure) until microbes break it down, compares local Microbes (IMO) with lab-made EM, lists four functions of IMO, and gives examples secondhand: David Wong's basil on Oʻahu, Alika's disease estimate, and Master Cho's desert seedlings in Mongolia (about 100 seedlings, four bean-sized pieces of charcoal around each, with IMO-4; morning dew the only water described). Details of these examples such as dates, places, and how results were measured: not stated.

What was compared
  • IMO in the soil — Your own indigenous microorganisms, collected where you farm. Rates not given.
  • Charcoal with IMO-4 at planting (Master Cho, Mongolia) — Four bean-sized pieces of charcoal around each tree seedling, plus IMO-4; the charcoal catches morning dew and houses the microbes.
Results
  1. Basil to first harvest in 3–4 months instead of about 6

    At David Wong's farm on Oʻahu, after using IMO; cutting went from every two months to every month, "and quality is very good". Told secondhand, no data shown.

    ▶ 1:17:35 As spoken

  2. Earthworms dig to seven feet; a tractor tills about 7 inches

    Worms that IMO helps bring back dig for moisture "seven feet", versus about 20 cm (7 inches) for a $30,000 tractor or tiller.

    ▶ 1:19:35 As spoken

  3. About 30% less disease after spreading IMO

    Alika's estimate as Park remembers it; Alika said he was "not 100% accurate".

    ▶ 1:20:54 As spoken

  4. IMO-4 holds about 90–95% moisture

    "If I remember correct". He says this lets it work in drought. Cho's own figure is 65–70% (see Cho check).

    ▶ 1:22:03 As spoken

  5. 97% of desert seedlings survived with charcoal and IMO-4

    Master Cho's Mongolian desert planting, about 100 seedlings, as Park tells it.

    ▶ 1:23:21 As spoken

  6. Often the problem is the roots, not disease on top

    When a plant looks bad, Master Cho pulls it out to look at the root system first.

    ▶ 1:25:31 As spoken

Hold it loosely
  • A lecture: every result is secondhand (David Wong, Alika, Master Cho) and from memory, with no data shown.
  • No comparison groups are described for the basil, the disease estimate or the desert seedlings.
  • Park flags his own uncertainty on the IMO-4 moisture figure and Alika's 30%.
  • The recording starts mid-lesson; whatever came before it is cut.
For your farm
  • Plants can't use fertilizer until it's broken down; microbes do that work.
  • Collect your microbes where you farm: they are adapted to your weather and soil.
  • Watch for earthworms; they till deeper than any tractor.
  • Charcoal holds water and gives microbes a home; it pairs well with IMO-4.
  • When a plant struggles, pull one and look at the roots before blaming a disease up top.

Next to Master Cho's teaching

  • Agrees

    Four functions of IMO: decomposition, catalysis, revitalization, disease suppression Park's list matches Cho's book point for point, including bacteria and fungi first, then nematodes and earthworms, as the soil comes back to life.

    Cho, Natural Farming Agricultural Materials (Recipe), p. 8

  • Agrees

    Use your own local microbes rather than lab-made EM Cho agrees and goes further: Natural Farming rejects foreign and lab-made microorganisms, and only local ones adapt with the same strength. Park is milder: "EM is okay. It works good."

    Cho, Janong Natural Farming (2003), p. 89

  • Differs

    IMO-4 has about 90–95% moisture Cho makes and keeps IMO-4 at 65–70% moisture and tops it up with OHN before use. Park hedged the figure ("if I remember correct"); go with Cho's 65–70%.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 57

  • Agrees

    Small pieces of charcoal plus IMO-4 at the seedling catch dew and house microbes Cho describes the same method in his own words: small pieces of biochar put on top without watering, moisture from passing clouds soaks in, then IMO-4 on the biochar so microbes live there. In this 2017 telling he places it in Tanzania (five pieces), not Mongolia (four pieces in Park's version).

    2017/Advanced Cho/nutrient cycle/IMG_2876 @ 0:38:30 (translated)

  • Agrees

    97% survival of Master Cho's desert trees in Mongolia Cho's CGNF presentation gives the same figure: trees planted in the Gobi by the Natural Farming method grew 15–20 feet in three years with 97% survival. It doesn't say how many seedlings or describe the charcoal.

    Natural-Farming-What-is-Natural-farming, p. 33–36

“So that's the guy who is the best for this condition.”

▶ 1:15:01

“The earthworm can dig down for you seven feet with no charge for the gasoline fee.”

▶ 1:20:09

“They give apartment housing for the IMO 4.”

▶ 1:23:03

“A lot of time the root system is a problem, not disease on top.”

▶ 1:25:38

“Soil is very important. We have to revive the soil.”

▶ 1:26:02

In this talk

  1. 1:12:43Microbes break fertilizer down so roots can use it
  2. 1:13:56Local microbes (IMO) vs lab microbes (EM)
  3. 1:16:09Jobs 1 and 2: decomposition and catalysis
  4. 1:17:23David Wong's basil: harvest sooner, cut more often
  5. 1:18:49Job 3: revitalization, earthworms dig seven feet
  6. 1:20:30Job 4: disease suppression
  7. 1:22:03IMO-4 holds moisture
  8. 1:22:39Charcoal as housing for IMO-4
  9. 1:23:14Master Cho's desert seedlings in Mongolia
  10. 1:25:01Pull the plant and look at the roots; revive the soil

Transcript

Transcribed and checked by hand against the recording. Click any time to play from there.