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Till Shallow, Roots Go Deep: Corn Mulch, Cabbage, Rice

Master Cho Han-kyu, interpreted by Kim Chang, Founder of Korean Natural Farming (Janong)

Spoken in Korean. Translated to English and checked line by line.

Scan of the Korean pear sheet (배: 자타일체의 원리에 따른 과수의 영양주기), the first of the four handouts listed on the board
Scan of the Korean pear sheet (배: 자타일체의 원리에 따른 과수의 영양주기), the first of the four handouts listed on the board
Scan of the Korean peach sheet (복숭아); its changeover treatment (교대기 처리) is dated June 20
Scan of the Korean peach sheet (복숭아); its changeover treatment (교대기 처리) is dated June 20
Scan of the Korean rice sheet (벼: 수도작의 영양주기)
Scan of the Korean rice sheet (벼: 수도작의 영양주기)
Scan of the prescription sheet, 영양주기에 따른 자연농업 처방 (자연농업 연구소), the fourth handout
Scan of the prescription sheet, 영양주기에 따른 자연농업 처방 (자연농업 연구소), the fourth handout

Video of this visit will be added to the members' archive. The transcript times below match that recording.

Cho shows how to grow grass to control grass: in Hawaiʻi, corn cut at a meter and laid down over IMO4, with cabbage and melons planted through it. Paired rice photos follow: 2–3 seeds a hill against 8–12, a murky paddy with loaches and no herbicide. He argues deep tilling makes shallow roots, sends out the four nutritive-cycle handouts after a qigong break, runs a pull test with the room, and ends on professors who teach the past.

What they found

The question

How do you stop weeds and get deep roots without plowing?

How they tested it

Cho's slides: a mulched field with squash, cabbage between laid-down corn, paired rice plantings (natural farming left, conventional right), loaches and small fish from the paddy. He draws a rice plant and its roots on the flip chart with '1.1~1.2m'. Cho steps out at about 7396 s and Tanya leads qigong until about 7593 s. Joe writes the four handout titles on the board: 1. Pear 2. Peach 3. Rice 4. Prescription for natural farming.

What was compared
  • Corn mulch for no-till beds (Hawaiʻi) — Cho: in Korea the cover is rye; Hawaiʻi is too hot, so grow corn, planted within 20 cm each way. Before laying it down, spread Microbes (IMO4) at 150 kg per 300 pyeong. Cut the corn at about 1 m and lay it down; it makes a layer about 10 cm thick, and 6–7 cm already stops grass. Part the corn and plant into it. For cabbage, the corn goes in about 2 months before. The interpreter added soil treatment solution with the IMO4.
  • Microbes on new land — Interpreter, after checking with Cho off-mic: on land that has never had IMO, apply about three times, six months apart. Cho's own words are not audible.
Results
  1. Grow grass to control grass: lay a cut cover crop down as mulch

    Korea uses rye; Hawaiʻi is too hot for rye, so use corn.

    ▶ 1:46:25 As spoken

  2. Cut the corn at about 1 m and lay it down; 6–7 cm of cover stops grass

    Corn planted within 20 cm each way gives a layer about 10 cm thick.

    ▶ 1:47:01 As spoken

  3. Plant by parting the laid-down corn: no weeds, little or no fertilizer

    Tomato and bell pepper do well; watermelon and melon come out clean; the cover holds moisture so crops stand drought.

    ▶ 1:48:12 As spoken

  4. Cabbage: corn planted 2 months before, laid down, cabbage planted between

    No weeds, and the cabbage does well.

    ▶ 1:50:46 From the slides

  5. Spread IMO4 at 150 kg per 300 pyeong before laying the corn down

    Then it ferments well and the corn itself becomes compost.

    ▶ 1:51:28 As spoken

  6. A cabbage normally weighs 6–7 kg; a natural-farming one reached 20 kg

    An audience member cited 64 lb cabbages in Fairbanks, Alaska; Cho: 'that's Alaska.'

    ▶ 1:53:07 As spoken

  7. Cabbage goes through 'morning sickness' four times; pin the dates and feed then

    The 'four times' was only in the interpreter's English; she named water-soluble calcium phosphate.

    ▶ 1:53:27 As spoken

  8. Rice: conventional plants 8–12 seeds a hill, natural farming 2–3

    12 seeds shoot straight up with thin stems and small ears; 2–3 spread like a fan with thick stems and big ears.

    ▶ 1:54:28 From the slides

  9. IMO4 in the paddy turns the water murky, and the murk keeps barnyard grass down

    Small animals and fish live there and cloud the water; the clear conventional paddy lets light in and grows weeds.

    ▶ 1:55:54 From the slides

  10. No herbicide needed: loaches and fish appear and eat the weeds

    Slides of loaches and small fish from the paddy.

    ▶ 1:57:31 From the slides

  11. Natural-farming rice stands in order, so it gets even sun and air

    Conventional rice looks like tangled hair.

    ▶ 1:57:55 From the slides

  12. Till deep and roots go shallow; till shallow and roots go deep

    ▶ 1:59:50 As spoken

  13. Roots go as deep as the plant stands tall; rice is 1.1–1.2 m, so its roots should reach 1.1–1.2 m

    Flip chart: a rice plant and roots with '1.1~1.2m'.

    ▶ 2:00:56

  14. Tillage reaches only 15–20 cm; untilled soil isn't hard anyway

    Cho: rice roots must go 1.2 m; you can't till that deep, and the untilled soil is soft and tender.

    ▶ 2:02:21 As spoken

  15. Old sugarcane land still holds microbes and beats soil that grew nothing

    Answer to an audience member who said Hawaiʻi's ag land is all contaminated.

    ▶ 2:07:02 As spoken

  16. On land that never had IMO: about three applications, six months apart

    Interpreter's relay; wording ambiguous.

    ▶ 2:09:42 As spoken

  17. Four handouts: 1. Pear 2. Peach 3. Rice 4. Prescription for natural farming by the nutritive cycle

    Drake hand-wrote English over the Korean sheets the night before with Google Translate, Kim Chang and Master Cho.

    ▶ 2:10:36

  18. Pull test: a plant from tilled soil pulls out whole; one from untilled soil breaks off

    The root that breaks off is the strong one. Cho: 'you've been taken in by scholar-swindlers.'

    ▶ 2:13:27 As spoken

  19. Farmers take the soil as their university and the crop as their professor

    Professors who farm after retiring do badly; crops grow toward the future, theory teaches the past, and every farm is different.

    ▶ 2:18:10 As spoken

Hold it loosely
  • Cabbage weight and the rice comparisons are Cho's photos and figures; no yield data were given here, and the question on the yield difference was deferred.
  • The cabbage's four 'morning sicknesses' were only in the interpreter's English.
  • The answer on IMO for new land is ambiguous (three times six months apart, or three times within six months).
  • The corn-mulch rates come from Cho's spoken Korean; the interpreter passed on only the 1 m height and 10 cm layer.
  • Whose 20 kg cabbage it was is not clear.
For your farm
  • In hot places, a dense corn stand cut at about a meter and laid down can be the weed-stopping mulch.
  • Spread Microbes (IMO4) under the corn before you lay it down so it turns to compost in place.
  • Plant through the mulch; it holds moisture and keeps fruit clean.
  • Sow fewer rice seeds per hill (2–3) so plants fan out with thick stems.
  • Till as shallow as you can and let roots work their way down.
  • Treat your soil as the school and your crop as the teacher.

Next to Master Cho's teaching

  • Agrees

    A cover crop laid down as mulch so weeds can't grow His theory book covers the soil with leaves or straw so weeds cannot grow. Corn as the Hawaiʻi cover is new here.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 38

  • Agrees

    Shallow tillage, deeper roots, and the pull test Nearly the same words, with the same pull test: crops in deep-plowed ground pull out; in unplowed ground the stems break.

    Cho, Cho Han-Kyu's Natural Farming (Theory), p. 23

  • Agrees

    Roots reach as deep as the plant is tall He told the 2017 fruit-tree class the same: the root should go as deep as the part above ground.

    2017/Advanced Cho/advanced fruit/IMG_3194 @ 0:29:04 (translated)

  • Goes further

    Microbes (IMO4) in the paddy in place of herbicide The 2005 newsletter's weed answer is IMO4 under laid rice straw. Here he adds the mechanism: murky water from small animals and loaches shades out barnyard grass.

    CGNF Advanced (2005.08) (English translation), p. 53

“Grow grass to control grass.”

▶ 1:46:25

“If you were rice, where would you want to live? Here? Or here?”

▶ 1:59:03

“Till deep and the roots go down shallow. Till shallow? The roots go down deep.”

▶ 1:59:50

“So you've been taken in by scholar-swindlers.”

▶ 2:16:11

“Farmers took the soil as their university and the crop as their professor.”

▶ 2:18:10

In this talk

  1. 1:46:24Grow grass to control grass: corn mulch, no-till
  2. 1:50:41Cabbage between laid-down corn
  3. 1:52:27Cabbage: 6–7 kg conventional, 20 kg natural
  4. 1:54:18Rice: 2–3 seeds a hill, not 8–12
  5. 1:55:54Microbes in the paddy: murky water, loaches, no herbicide
  6. 1:58:46Deep tilling makes shallow roots
  7. 2:03:23Break: qigong with Tanya
  8. 2:06:41Old sugarcane land still holds microbes
  9. 2:08:00Questions and the four nutritive-cycle handouts
  10. 2:12:30Pull test: tilled vs untilled roots
  11. 2:17:04Professors teach the past; crops grow to the future

Transcript

English translation, checked against the Korean as spoken.