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Mac Nuts, Kalo and 500 Pigs: Natural Farming at Scale

Chris Trump, John Caverly, David Wong, Hawaiʻi Island farmers using natural farming at scale · USA (Hawaiʻi)

Three Hawaiʻi Island farmers tell how they run natural farming at scale: Chris Trump on his family's 750 acres of macadamia nuts in Kohala, John Caverly ("Ginger John") on 18 acres of kalo, sugar cane and vegetables, and David Wong on 10 acres of Asian vegetables and about 500 pigs. They give their application rates, how they make Microbes (IMO) by the ton with farm machinery, what weeds and mowing cost, and the permits a no-smell piggery needed. Moderated by Kyle, president of the HFUU East Hawaii chapter.

What they found

The question

How do farmers run natural farming on hundreds of acres, or with hundreds of pigs, and what does it cost and save them?

How they tested it

Three farms, all on Hawaiʻi Island, all self-reported. Chris Trump: family macadamia farm in Kohala, about 750 acres; about 200 acres in their first year of natural farming, about 120 in years two to three, small trial blocks four years or more; the rest organic or conventional. John Caverly: 18 acres of kalo, sugar cane, ʻulu, vegetables and fruit, on land he says had 70 years of cane, 15 years of rotated commercial sweet potatoes and a methyl-bromided ginger field; natural farming since about 2008. David Wong: former dairy family; natural farming since 2011, now 10 acres of Asian vegetables and, since 2012, a piggery that grew from 9 piglets to about 500. No farm gives yields, controls or measured data beyond the numbers below.

What was compared
  • IMO 4 on the orchard (Chris Trump) — One application a year of solid IMO 4 at 1,000 lb per acre, spread along the drip line with a belt compost spreader; plus about 500 gallons of liquid IMO 4 per 20 acres about twice a year. On his three-year blocks he plans to stop, or spray once a year at most.
  • IMO 3 by the ton (Chris Trump) — Piles of 1–2 tons up to 10–20 tons under low tents of gray tarps (30×30 ft for 10–20 tons; one 20×20 or 20×30 ft tarp for a two-ton batch) on 2–3 ft poles. Tent lifted with a forklift on the tractor or propped on 10 ft poles, pile turned with a compost turner or front loader. Carbon (wood chips) added to big piles, about 50-50 carbohydrate (mill run) to carbon material. Water about 2.5 gallons per 60 lb of material, not the 5 gallons per 60 lb he was taught.
  • IMO 4 under kalo (John Caverly) — About 500 lb of IMO 4, made over a couple of months, dumped under a diseased kalo field and mulched. Since then IMO once a year (three years on the cane), thick mulch once a year, no bought fertilizer; at the time 'IMO 4, mulch, and horse and cow manure', though later he says he has used no manure for a few years.
  • Fireweed pasture (Chris Trump) — Two acres: spaded lightly, IMO 4 at 1,000 lb per acre, seeded with wild guinea grass cuttings and signal grass, liquid IMO sprayed a week later. Fireweed left in place.
  • Pigs (David Wong) — Litter-system pens built to Mike DuPonte's template; feed amount judged by eye each day instead of a fixed ration (he gives 2 lb per head per day as the conventional rule); no shots. No feed recipe or litter recipe given.
Results
  1. About 750 acres of mac nuts; about 300 in natural farming

    Roughly 200 acres in year one, about 120 in years two to three, small trial blocks four years or more. Earlier the farm ran about 360 acres organic and 360 conventional.

    ▶ 1:05 As spoken

  2. Dying trees came back in a 14-tree trial

    After a year, trees with fungal disease flushed with leaves; three he says had quick decline, which normally means pushing them over, were producing nuts by the end of the first year.

    ▶ 21:29 As spoken

  3. In a drought, only the 25 natural farming acres stayed green

    All other orchards turned yellow.

    ▶ 23:12 As spoken

  4. Spending 'significantly less per acre than even conventional'

    Even counting mowing. No dollar figures given. Makes one batch of each solution per year.

    ▶ 23:50 As spoken

  5. IMO 4 at 1,000 lb per acre once a year, liquid IMO 4 about twice a year

    About 500 gallons of liquid IMO 4 per 20 acres.

    ▶ 27:56 As spoken

  6. Leaf tests differ from soil tests on the same soil

    His natural farming trees show nutrients in leaf tissue that the soil test says are short; he credits fungal partners at the root tips. He plans to bring all 750 acres into natural farming within a couple of years.

    ▶ 48:05 As spoken

  7. Turning a one-ton IMO pile by shovel takes one person about six hours

    His reason to mechanize, or to do as Korean farmers do and make one ton among ten farmers.

    ▶ 1:07:45 As spoken

  8. Wood chips gave 'astronomically more fungal growth' in IMO 3

    Side-by-side piles: mill run only; mill run and wood chips; mill run, wood chips and humic acid (vermi leachate). Wood chips beat mill run alone; humic acid added as much again. He saw it under a microscope; no counts given.

    ▶ 1:09:09 As spoken

  9. Water: 2.5 gallons per 60 lb, not 5

    He thinks 5 gallons per 60 lb suits cold, dry Korean winters, not Hawaiʻi.

    ▶ 1:09:55 As spoken

  10. Mowing is the big extra cost

    No Roundup on natural farming acres, so five 15-foot Schulte batwing mowers run all year plus three men on zero-turn mowers. On the two- to three-year blocks the canopy is closing, grass is dying back and he sees no erosion.

    ▶ 1:11:57 As spoken

  11. Fireweed gone in two months on a two-acre pasture

    After one month the fireweed was thinner and covered in pests and disease; after two months none. The owner now runs four cows on two acres instead of two, two years later. The neighbor next to it is still solid fireweed. The owner had planned to spend $8,000–9,000 to disk and reseed.

    ▶ 1:18:49 As spoken

  12. Six flats each of seedlings: IMO flats were greener within 10 days to 2 weeks

    Parsley and poha berries; three flats with his organic mix, three with IMO. IMO flats were greener, lusher, with solid roots.

    ▶ 4:44 As spoken

  13. 500 lb of IMO 4 under sick kalo; thousands of worms by Thanksgiving

    The field had a virus he calls dasheen mosaic and no worms. Since then he says his kalo has no blemishes or disease.

    ▶ 6:17 As spoken

  14. Stopped spending $8,000–12,000 a year on fertilizer

    He used to buy organic fertilizer shipped from the mainland; he also used to buy 3–5 pallets of chicken manure a year and now buys none.

    ▶ 7:27 As spoken

  15. Red soil turned black under cane

    IMO once a year for three years; his oldest cane field is about eight years old. Thick mulch once a year cleared guinea grass and California grass.

    ▶ 37:25 As spoken

  16. From 9 piglets in 2012 to about 500 pigs

    Visitors at 50, 100, 200 and 400 pigs found no smell, no flies and no waste problem.

    ▶ 17:02 As spoken

  17. No pneumonia, no diarrhea, no shots

    He says a conventional farm of his size and density would expect about 10% of pigs with pneumonia and 15% with diarrhea, using 500–1,000 cc of penicillin and tetracycline a day.

    ▶ 44:57 As spoken

  18. 10 acres of Asian vegetables; no weeds after a year of mulch

    No tilling; patches of grass are pulled by hand.

    ▶ 16:45 As spoken

  19. The piggery was inspected daily in its first year

    Required: a building permit, NRCS clearance on manure handling, a 5 mil plastic liner in the pit. It has no lagoon and no runoff. Every pig went to a federally inspected slaughterhouse. Composting runoff that leaves a site can be charged at $10,000 a day, he says.

    ▶ 1:25:13 As spoken

Hold it loosely
  • Every number is self-reported from memory; no data, records or photos were shown.
  • No controls except Chris Trump's 14-tree trial and John Caverly's six-flat seedling test, neither with counts or replication.
  • Chris Trump's cost claim has no dollar figures; John Caverly's $8,000–12,000 is past spending, not a measured saving.
  • The 'chemistry manager vs biology manager' idea is the moderator's summary, not a result.
  • Disease names (quick decline, dasheen mosaic virus) are the farmers' own calls, not lab diagnoses.
  • David Wong's story of Master Cho's life (his teachers, jail, the church) is retold from conversations with Cho, and John Caverly's Korean rice county figures (6% more yield, 6% lower costs, double the price) are secondhand; neither was checked.
  • The fireweed pasture is one two-acre field compared with a neighbor's, not a trial.
For your farm
  • Big piles of Microbes (IMO) need more carbon; wood chips mixed with the mill run helped Chris Trump control heat and grow more fungus.
  • Judge water by the feel of the pile and your climate; Chris Trump uses about half the water he was taught.
  • At scale, plan the machinery first: a one-ton pile by shovel is about six hours for one person.
  • Without herbicide, budget for mowing or thick mulch and hand weeding.
  • Put IMO out late in the day, in cloud, or under mulch, never in strong sun.
  • For a natural farming piggery in Hawaiʻi, expect permits and inspection; Mike DuPonte's template covers the state requirements.

Next to Master Cho's teaching

  • Differs

    IMO 4 at 1,000 lb per acre, once a year Cho's rate is at least 150 kg per 0.1 ha (about 1,340 lb per acre), scattered so the topsoil is barely covered; Chris's 1,000 lb is below that minimum, though he adds liquid IMO 4 twice a year.

    Cho, Natural Farming Agricultural Materials (Recipe), p. 18

  • Differs

    Water: 2.5 gallons per 60 lb of IMO 3 material instead of 5 In Hawaiʻi Cho's team gave 5 gallons per 60 lb to reach 65–70% moisture. Chris uses half that. Cho's real target is the moisture level, so a drier mix by squeeze test is within his rule only if it still reaches 65–70%. In the same talk Cho allows flour 50% with dry leaves 50% when there is no mill run, close to Chris's 50-50 carbohydrate to carbon.

    2017/Advanced Cho/nutrient cycle/IMG_2880 @ 0:07:15 (translated)

  • Agrees

    Rice straw over IMO 3 piles; shade cloth Cho covers IMO 3 with straws, straw mats or fallen leaves for 70% shade, noting the useful microbes rice straw carries. That matches what Chris saw in Korea, and why Cho's daughter frowned at John's shade cloth.

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

  • Agrees

    Put IMO out late in the day or under mulch, out of the sun Cho says to apply IMO 4 two to three hours before sunset.

    Cho, Natural Farming Agricultural Materials (Recipe), p. 18

  • Goes further

    Pigs with no shots and no smell; plastic liner in the pit Cho writes that natural farming pigs need no medicine except a cholera shot, and that ordinary farms spend 10–15% of sales on medicine, matching David's account. But Cho's floor is dug a metre into the soil and filled with sawdust, bark and 10% soil; David's NRCS rule puts a 5 mil plastic liner in the pit, cutting the floor off from the soil.

    Cho, Janong Natural Farming (2003), p. 189

“And natural farming came along. It was like the trade winds blew into my life and off I went.”

▶ 7:15

“I've looked at it under a microscope. All IMO is not the same.”

▶ 25:46

“So why are you raising 40 pound baby plants?”

▶ 54:54

“You manage the biology and the biology manages the chemistry.”

▶ 1:02:59

“It'll take one person to turn a one-ton batch by shovel a good six hours of shovel work.”

▶ 1:07:45

In this talk

  1. 0:00Kyle opens the panel
  2. 0:42Chris Trump: 750 acres of mac nuts
  3. 2:01John Caverly: poisoned land and the Thanksgiving worms
  4. 7:55David Wong: from dairy to vegetables and pigs
  5. 18:25Chris: the 14-tree trial and the drought
  6. 27:10Q: how much IMO, how often
  7. 28:31John: grandmothers, compost and love
  8. 39:05John: how Maine's small dairies were lost
  9. 42:18David: retraining a crew to feed by eye
  10. 46:01Chris: same soil, different leaf tests
  11. 49:47David: drones, and Cho on black roots
  12. 55:55Chris: why commercial farmers stop listening
  13. 57:40John: no science, no papers, and a Korean rice county
  14. 1:01:44Kyle: manage the biology
  15. 1:03:43Chris: making IMO by the ton
  16. 1:08:20Q: heat, carbon and water in big piles
  17. 1:11:09Q: weeds without Roundup
  18. 1:14:24Weeds in vegetables and cane
  19. 1:16:45Chris: the fireweed pasture
  20. 1:20:19Q: does John still use manure?
  21. 1:24:35Q: permits for the pig pens
  22. 1:29:33Close

Transcript

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