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Microbes (IMO) by Hand: Squeeze Test, Keep It Under 120°F

Dr. Hoon Park, John Caverly, Dr. Park: physician who brought Korean Natural Farming to Hawaiʻi; John: Hawaiʻi Island farmer · USA (Hawaiʻi)

Dr. Hoon Park and farmer John (very likely 'Ginger John' Caverly) teach the Microbes (IMO) method on the lawn: rice in a box, then rice plus brown sugar, then a pile of wheat mill run wetted with IMO-2 and Food (FPJ) water and checked with a squeeze test. A woman helper who is never named shows an IMO-1 box and talks about mill run supply. A second group gets the IMO-3 temperature rule and Master Cho's four jobs of IMO, Dr. Park tells how he drinks Protectors (LAB) for his stomach, and John says roots and microbes work together.

What they found

The question

How do you make Microbes (IMO) by hand, from catching them on rice to a working IMO-3 pile, and what do they do in the soil?

How they tested it

Outdoor skill share on the lawn under a tent, on a blue tarp. IMO-1: a small wooden box filled two-thirds with dry cooked rice ('white rice is okay'), covered with breathable cheesecloth (rice straw ideal), set under bamboo or where fallen leaves pile up and people don't walk (a lawn, woods in Hawaiian Acres and healthy mango trees are also named), covered against mongoose and kept out of the rain (a small plastic hoop house), always in shade. 'Usually takes about three days' here. Good IMO-1 is white 'like cotton candy' and lifts out as one lump; bluish or blackish means other microbes, totally black means make another. Don't touch the rice with your hands. IMO-2: IMO-1 mixed 'one to one' with brown sugar (hands are fine now), put in a jar (clay jar ideal; glass or plastic, shaded from sun, with a cloth cover); ready in 'about 10 days, 1 to 2 weeks'. In a cool place it stays dormant and keeps 'almost forever'. IMO-3: wheat bran ('mill run', from paper sacks) piled on the tarp. IMO-2 stirred into a bucket of water ('4 gallons'). Dr. Park says '0.5% is ideally' and pours about '45 cc' ('one and a half ounces'). Food (FPJ: sweet potato, banana, Drake's basil leaf and flower) added at 'generally 1 to 500'. In his own IMO John also adds 'a little molasses', spirulina and 'a little fish amino acid'. Moisture target given as '60-70% or 65%', then '60-75%', then '65-75%'. Squeeze test: a ball that drips water is too wet ('more than 70%', later 'more than 75%'); one that crumbles is too dry ('65%'); aim for 'not crumbling, not leaking water'. Shown on camera: the first ball crumbles ('not 60% yet'), a later one drips ('this is too much, you gotta mix more'). Pile 'about one or one and a half feet high' in shade, mulched or covered so no sunlight gets in. John does it on a dirt floor in a shed under a sheet, cloth or bamboo, never on plastic at home. Heat: hot within 24 hours. 'Keep it under 120 degrees'; John: 'You don't want it to get over 132, 130'. If it's too hot, mix it 'up and down' (John: 'once or twice'). White 'like it snowed' in about 24 hours, with a crust top and bottom. Done when it cools: '5 to 7 days' in the tropics (John also says '4 to 5 days, 6 days'), longer in cold Korea. Shade: Dr. Park quotes Master Cho's '3-7 ratio' as '7 light, 3 shade'. IMO-4: not made or explained; only named as the next step after IMO-3 cools, and as what suppresses disease. Not stated: how much mill run, how much IMO-2 or water went into this pile, how to store IMO-3, how to make IMO-4.

What was compared
  • IMO-2 water — IMO-2 stirred into about 4 gallons of water; '0.5%' given as the ideal, about 45 cc (1.5 oz) poured
  • Food (FPJ) water — sweet potato, banana and basil Food (FPJ) added to the same water, 'generally 1 to 500'
  • IMO-3 pile — wheat mill run wetted to the squeeze test, piled 1 to 1.5 ft, covered, in shade; kept under 120°F by turning; 5 to 7 days
Results
  1. IMO-1 takes about three days here

    Rice turns white 'like cotton candy' and comes out as one lump; blue or black means other microbes

    ▶ 1:24 As spoken

  2. IMO-2 is IMO-1 plus brown sugar, one to one

    About 10 days, 1 to 2 weeks; then dormant, keeps 'almost forever' in a cool place, jar with a cloth cover

    ▶ 6:59 As spoken

  3. Squeeze test: dripping is too wet, crumbling is too dry

    Target stated variously as 60-70%, 65%, 60-75% and 65-75%; the demo ball first crumbled, then dripped after water was added

    ▶ 24:01 Said and shown on the slides

  4. IMO-2 at '0.5%', about 45 cc in 4 gallons

    Dr. Park's spoken arithmetic doesn't hold together (see limits)

    ▶ 8:59 As spoken

  5. Food (FPJ) at 1 to 500

    Any vigorous edible plant, not poisonous ones; growing tips (6 inches; Korean watercress about 30 cm); purslane and comfrey named

    ▶ 16:51 As spoken

  6. Pile 1 to 1.5 ft, covered, in shade; 5 to 7 days

    Done when the heat drops and it's covered in white

    ▶ 25:22 As spoken

  7. Keep IMO-3 under 120°F

    Above about 130°F you grow different microbes that won't suit your soil, and kill many; turn it once or twice

    ▶ 27:05 As spoken

  8. Four jobs of IMO: decomposition, catalysis, revitalization (earthworms), disease control

    Dr. Park quizzes the second group

    ▶ 35:16 As spoken

  9. Alika Atay estimated about 30% less disease after using IMO-4

    A 'ballpark figure' passed on second-hand; Dr. Park: 'it didn't have an exact measure'

    ▶ 44:36 As spoken

  10. A ton of mill run costs about $600 shipped from the mainland

    The local mill that supplied farmers and mushroom growers closed about a year earlier

    ▶ 33:09 As spoken

Hold it loosely
  • One demonstration. The pile was mixed and wetted but not followed through heating or finishing.
  • Numbers shift as they talk: moisture is 60-70%, 65%, 60-75% and 65-75% at different moments; days are 5-7 and 4-6.
  • Dr. Park's dilution arithmetic doesn't add up: '0.5%' of 16,000 cc would be 80 cc, but he pours about 45 cc; for Food (FPJ) at 1 to 500 he divides '60,000 cc' and gets '300 cc', though 4 gallons is about 15,000 cc (about 30 cc at 1 to 500).
  • The demo pile sits on a plastic tarp, while John says to make IMO-3 on bare ground, not plastic.
  • The 30% disease figure is a farmer's ballpark estimate passed on second-hand. The LAB, Medicine (OHN) 'cures the flu' and drought claims are personal stories, not trials.
  • Cut from three iPhone clips: the second (from 34:30) and third (from 47:57) are later groups, so some steps are repeated and others missed.
For your farm
  • Set the IMO-1 box where leaves pile up and nobody walks, keep it in shade and out of the rain, and expect white mold in about three days in Hilo's warmth.
  • Mix IMO-1 one to one with brown sugar so the microbes stay dormant; keep the jar cool with a cloth cover.
  • Wet the bran slowly. Squeeze a handful: if water drips, add bran; if it falls apart, add water.
  • Pile 1 to 1.5 feet in shade, cover it, and check the heat daily. Turn it if it goes past about 120°F.
  • IMO-1 can fail; it's two cups of rice. Compost it and try again.

Next to Master Cho's teaching

  • Agrees

    IMO-2 is IMO-1 plus brown sugar, 1:1, kept cool Cho mixes IMO-1 with brown sugar 1:1 by weight in a clay jar covered with paper and says it takes over 7 days; the demo's '10 days, 1 to 2 weeks' fits.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 53

  • Goes further

    IMO-3 moisture and the squeeze test Cho gives 65-70% and tests by twisting a bran ball that should split easily into two halves. The demo's drip/crumble squeeze gets to the same place, but its spoken range drifts out to 60-75%.

    Cho, Natural Farming Agricultural Materials (Recipe), p. 15

  • Differs

    IMO-2 at 0.5% and Food (FPJ) at 1:500 in the water Cho dilutes IMO-2 500 to 1,000 times (0.1-0.2%), with FPJ at 1/500 as a nutrient liquid. Food at 1 to 500 matches; '0.5%' would be 1 to 200, stronger than Cho, though the 45 cc actually poured into about 4 gallons is nearer 1 to 350.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 54

  • Agrees

    Pile height, heat, turning and days Cho stacks it 35-40 cm on soil, covers it with straw mats, keeps it below 40-50°C by flipping 3 or 4 times, and expects white in 5 to 7 days. The demo's 1 to 1.5 ft, under 120°F (49°C) and 5 to 7 days match. John's 'once or twice' is fewer turns, and his 130-132°F ceiling is a little hot.

    Cho, Janong Natural Farming (2010 draft), p. 31

  • Differs

    Shade ratio and covering Cho recommends 70% shade and 30% light, covered with straw or fallen leaves on a soil floor. Dr. Park says '7 light, 3 shade', which is reversed (probably a slip, since he stresses shade throughout). John's story has Master Cho shrugging off a plastic shade cloth.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 55

“I'm just a farmer. I just grab things and throw it in and pour it in like that.”

▶ 10:31

“Master Cho says, it's okay. With his enthusiasm, it's alright.”

▶ 11:16

“So this is too much, you gotta mix more.”

▶ 25:02

“You come back in 24 hours and it's going to look like it snowed on it.”

▶ 28:19

“All you're going to be wasting is, like, two cups of white rice.”

▶ 31:29

In this talk

  1. 0:00IMO-1: rice box under the bamboo (Dr. Park)
  2. 3:46Keep it dry and shaded; mango trees (John)
  3. 4:48What microbes like: warmth, shade, moisture
  4. 6:01The squeeze test, explained
  5. 6:52IMO-2: one to one with brown sugar
  6. 8:52Measuring IMO-2 into the water
  7. 10:17"I'm just a farmer": Master Cho at John's farm
  8. 11:46IMO-3: mill run and IMO-2 water
  9. 13:00Side talk: sweet potato Food (FPJ) at first light (John)
  10. 16:42Food (FPJ) at 1 to 500; which plants to use
  11. 22:45Everyone mixes the pile
  12. 24:01Squeeze test on the pile: too wet
  13. 25:22Pile, cover, heat, turn, 5 to 7 days
  14. 27:42John's shed: dirt floor, white in 24 hours
  15. 29:41Storing IMO-2
  16. 31:10When IMO-1 fails (helper)
  17. 32:08Substitutes for mill run, and the cost
  18. 34:30Second group: 120°F and the four jobs of IMO
  19. 35:52Dr. Park's stomach and Protectors (LAB)
  20. 41:25Microbes and roots (John)
  21. 43:40IMO, drought and disease
  22. 45:12JADAM, buying in bulk, Medicine (OHN)
  23. 47:57Third group: is IMO-4 with actinobacteria safe?

Transcript

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