Korean Natural Farming (KNF), developed by Master Cho Han-kyu, provides a framework for creating zero-cost soil fertility by culturing indigenous microorganisms (IMO) found in local forests. By utilizing abundant natural resources like cassava, fruit, and sardine waste, farmers can produce effective bio-inputs that eliminate the need for expensive chemical alternatives.
What Is Korean Natural Farming (KNF)?
Developed by Master Cho Han-kyu in the 1960s, Korean Natural Farming is a system that uses indigenous microorganisms (IMO) to build soil fertility without buying any synthetic fertilizers. You collect microbes from your own forest, cultivate them, and apply them to your fields.
Cost: $0. You use what nature already provides.
The 5 IMO Levels
| Level | What You Do | Cost | Time |
|---|---|---|---|
| IMO 1 | Cooked rice in forest leaf litter → captures local microbes | $0.50 (rice) | 3-5 days |
| IMO 2 | Mix IMO 1 with brown sugar → preserves microbes | $1 (sugar) | 7 days |
| IMO 3 | Mix IMO 2 with bran → expands colony | $2 (bran) | 7 days |
| IMO 4 | Mix IMO 3 with soil → massive expansion | $0 (local soil) | 7 days |
| IMO 5 | Mix IMO 4 with compost → field application | $0 (compost) | 7 days |
Total cost for 1 hectare treatment is approximately $3.50, which offers a powerful, low-cost alternative to expensive chemical fertilizers.
Why KNF Is Perfect for Mozambique
| Factor | Benefit |
|---|---|
| No purchased inputs | Farmers earn $400/year — can't afford fertilizer |
| Uses local forest microbes | Mozambique has 31M ha of forest = unlimited source |
| Builds soil permanently | Chemical fertilizers deplete; KNF regenerates |
| Works in tropical climate | KNF developed in similar Korean climate |
| Uses rice, sugar, bran | All available in Mozambique |
| No machinery needed | Hands and a shovel |
| Compatible with DUAT land | Apply to any registered land |
The Nature of Mozambican Agricultural Land
Land rights (DUAT), community mapping, soil, water, erosion and regeneration. Read the DUAT chapter and five soil tests free.
PDF ebook, instant download. $5 of every copy buys seed for a farmer.
KNF Inputs from Mozambican Resources
| KNF Input | Asian Recipe | Mozambican Equivalent |
|---|---|---|
| IMO (microbes) | Forest leaf litter | Any of 31M ha forest |
| FPJ (fermented plant juice) | Fast-growing plants | Cassava leaves, sweet potato vines |
| FFJ (fermented fruit juice) | Ripe fruit | Mango, banana, papaya, cashew apple |
| FAA (fish amino acid) | Fish waste | Sardine heads from coastline |
| WCA (wood calcium) | Burned hardwood ash | Charcoal ash (abundant) |
| OHN (oriental herbal nutrient) | Garlic, ginger, alcohol | Local garlic, ginger, cana (sugarcane spirit) |
| LAB (lactic acid bacteria) | Rice wash water | Rice wash from any household |
Every single KNF input can be made from materials already available in Mozambique. Learn more about supporting farmers with MBC.
KNF in the Smallholder Farmer’s Season
For a smallholder farmer in Zambezia working with the COJAZ cooperative, KNF means moving from a dependency on costly, imported inputs to utilizing their immediate environment. During the growing season, instead of waiting for capital to purchase fertilizer, a farmer can dedicate time to gathering forest microbes or fermenting fruit juices, effectively managing their soil biology throughout the planting and harvest cycles.
Related guide: Climate-smart agriculture in Mozambique: 6 technologies helping farmers beat drought, floods and cyclones
Frequently asked questions
What are indigenous microorganisms? They are the native bacterial and fungal colonies found in local forest leaf litter that promote plant growth.
How much does it cost to treat a hectare with KNF? The basic components, such as rice and sugar for the starter culture, cost approximately $3.50 per hectare.
Can KNF replace synthetic fertilizers? Yes, KNF builds soil fertility and regenerates the land permanently, unlike chemical fertilizers that can deplete soil health over time.
Meet the farmers who are applying modern and traditional techniques to improve their yields. Read more on our blog.
Maputo Bridge Capital (MBC), founded by Anselmo Boaventura in Fort Worth, Texas, connects sponsors with verified smallholder farmers in Mozambique, working with the COJAZ cooperative in Zambezia. A sponsor gives from $25, which goes directly to the farmer's local seed and fertilizer shop; 92% supports the farmer, while 8% covers documentation. To help, please sponsor a farmer from $25. Sponsorships are gifts, not investments, and are not tax-deductible.