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Korean natural farming

Korean Natural Farming (KNF) known in Korean as Hanguk Shik Jayeonnungpap is an organic agricultural method that takes advantage of indigenous microorganisms (IMO) to produce rich soil that yields high output without the use of herbicides or pesticides.

History
Hankyu Cho (1935~2025), born in 1935 in Suwon, Gyeonggi do, Korea, started the Korean Natural Farming method. He started to farm since he was 13 years old from his hometown, Suwon, South Korea. However, he felt it is not enough of learning so he decided to go to Suwon Agricultural High School to study more. Cho completed his high school education at the age of twenty-nine while still working on his family's farm. He went to high school at the late age due to the Korean War. He gave up on going to college because it was different from the farming methods he had learned from the nature, and wanted to learn together with like-minded friends. In 1965, he went to Japan for three years as an agriculture research student and studied the natural farming methods of the three teachers: Miyozo Yamagishi (), Kinshi Shibata (柴田 欣志) and Yasushi Oinoue (大井上 康). Upon his return to Korea, Cho combined his newly acquired knowledge with traditional Korean farming methods and fermentation methods (e.g., as used in Korean foods such as kimchi) and gradually invented what is now called Korean natural farming. He put it into practice by setting up a "Labour-Saving Abundant Harvesting Study Group" in 1966. He opened the Natural Farming Life School and Research Farm in Goesan County, North Chungcheong Province, in 1995. He established the Evergreen Agricultural Association and became the president of the Korean Natural Farming Association in 1989. From 1992 onward, Cho contributed to the 21-part article in the "Modern Agriculture" magazine (), published in Japan. He also published The Natural Farming of Hankyu Cho in 1992 which was translated in several different languages. Cho published Saving Indigenous Microorganisms (Japanese edition) in 1993 and "Soil Must Live for the Table to Thrive" in 1994. He published Korean Natural Farming: Indigenous Microorganisms and Vital Power of Crop/Livestock by Hankyu Cho& Atsushi Koyama (English edition) in 1997. To spread Korean Natural Farming (KNF) overseas, he travelled to around 30 countries and people there call him "Master Cho". Cho published more two books afterward, All About Heavenly Green Juice (Japanese edition) in 1998 and Making Natural Farming Materials (Korean edition) in 2000. He spend his whole life on spearding his knowledge and help farmers. Hoon Park brought KNF to Hawaii from South Korea where, as a missionary, he noticed KNF commercial piggeries with virtually no odour. Based on Cho's activities, he received many awards and honors. Awarded the Sektap Industrial Medal, recipient of the Korea-Japan International Environmental Award (The Asian Environmental Awards), jointly established by the Chosun Ilbo and Japan's Mainishi Shimbun, awarded the Zhengzhou Friendship Award (China), the Jilin Province Friendship Award (China), the Excellent Foreign Expert Award by the Yanbian Korean Autonomous Prefecture (China) and Recopient The Dosan Education Award. In 2008, he renamed his natural farming school and lab to "Cho Han-kyu Global Village Natural Farming Research Institute", or Janong Natural Farming Institute. In 2019, Cho went to Perris (CA), Williams (OR), and Rochester (WA), the United States to meet his students and discuss about KNF. == Principles ==
Principles
The fundamental insight of KNF is to strengthen the biological functions of each aspect of plant growth in order to increase the productivity and nutrition. Biology thereby reduces or eliminates the need for chemical interventions, whether to protect against predation or competition with other plants. For example, the metabolism of indigenous microorganisms (IMOs) produces complete proteins, while insects prefer incomplete proteins. . KNF avoids the use of manure, thereby reducing the chance of transferring pathogens from the manure back into the food production chain, although in nitrogen-poor conditions adding manure can increase yield. • Use the nutrients contained within the seeds • Use indigenous microorganisms (IMO) • Maximize inborn potential with fewer inputs • Avoid commercial fertilizers • Avoid tilling • No use of livestock-waste == Indigenous microorganisms ==
Indigenous microorganisms
Potential benefits include increased rates of soil organic matter decomposition, increases in nutrient availability, improved plant yield, a reduction in pathogenic microorganisms and an increase in plant defenses. A healthy rhizosphere contains some 7 million microorganisms per hectare. Its rhizome contains diverse species and a relatively small concentration of microorganisms that damage plant life and a relatively large amount of plant secretions. Mold constitutes 70–75%, bacteria 20–25% and small animals the rest. The microorganisms contain approximately 70 kg of carbon and 11 kg of nitrogen, similar to the amount of nitrogen typically applied as fertilizer. Soil nutrient cycling Nutrients are taken up and deposited in a natural cycle unless disrupted by human intervention. As plants decay, "detrital" nitrogen and phosphorus are returned to the soil. Soil fungus and bacteria absorb those nutrients. The fungus and bacteria are consumed by fungal and bacterial-feeding nematodes, respectively. Those nematodes are in turn consumed by omnivorous predatory nematodes. At each stage, some inorganic nitrogen and phosphorus is returned to the soil and is absorbed by the plant. Bacteria and fungi Three types of bacteria common in KNF include lactic acid bacteria, purple bacteria, Bacillus subtilis and yeast. Mycorrhizae Mycorrhizae are "fungus roots", a mutualistic association between a fungus (Myco) such as Aspergillus oryzae and plant roots (rhiza). This provides an interface between plants and soil. The fungus grows into the roots of crops and out into the soil, increasing the root system many thousand-fold. The fungi use their enzymes to convert soil nutrients into a form that crops can use and turn plant carbohydrates into soil amendments, "sequestering" carbon. Miles of mycorrhizae can be found in a single ounce of soil. Mycorrhizal soil inoculation increases soil carbon accumulation by depositing glomalin, which increases soil structure by binding organic matter to mineral particles. Glomalin gives soil its tilth (texture), buoyancy and water absorption ability. Biochar (charcoal) shelters mycorrhizae in myriad, tiny holes. Other mycorrhizal impacts include enhanced water uptake, reduced water needs (increased drought resistance), increased pathogen resistance, and overall increased plant vigor. Nematodes Nematodes such as the reniform nematode Rotylenchulus reniformis are often seen as harmful to agriculture and are a frequent target of pesticides. However, KNF asserts that 99% of nematodes are beneficial and even consume parasitic nematodes. Herbivorous, fungivorous, bacterivorous, and omnivorous nematodes are important participants in nutrient cycling. Tillage and other soil management practices affect nematode variety and populations. Conservation tillage benefits bacterivores and fungivores, but the structure index (SI) is not different between cover cropping and fallow fields. In one experiment, simple no-till and strip-till failed to show increases in soil food web structure over two years but did after six years. In the greenhouse, green manure increased omnivorous and predatory populations. Strip-till of sunn hemp cover crop followed by mulching soil surface periodically with sunn hemp residues enhanced SI within 2 cropping cycles. == Stages of plant development ==
Stages of plant development
KNF posits three primary stages of plant growth. Each stage requires a different balance of nutrients. Vegetative growth In the vegetative growth phase, the plant extends its roots, branches and foliage. The key nutrient in this stage is nitrogen. KNF prefers the use of a preparation of fish amino acids for this phase. Flowering/reproduction After the plant has reached sufficient size, the plant diverts its energy into making flowers to attract pollinators. The key nutrients in this stage are calcium and phosphorus. KNF prefers the use of a preparation of fermented plant juice and other amendments for this phase. Fruiting After flowering is complete, the plant shifts its focus to bringing its fruit to full ripeness. Calcium enhances the size and sweetness of the plant and its fruit. KNF prefers the use of a preparation of pulverized eggshells in BRV (brown rice vinegar) for this phase. == Amendments ==
Amendments
KNF uses a variety of amendments either to directly enhance plant growth or to enhance IMO proliferation. Note: all water first stands in an open container for several days to allow chlorine and any other volatiles to escape. Amendments are diluted 500–1000:1 for use. Fermented items KNF ferments a variety of materials for use in different contexts. Fermented products are produced in glass or ceramic (not metal or plastic) containers filled to – of their capacity and covered with porous paper or cloth. Brown sugar or jaggery (BS/J) is used as a fermentation agent. KNF does not use molasses, which contains excess moisture. Fermentation takes place in a dark, cool area and the results must be refrigerated or kept in a cool environment. The ideal temperature for fermentation is . Fermented fruit juice Fermented fruit juice (FFJ) uses the juice of locally-grown fruits with relatively high sugar content, such as banana, papaya, mango, grape, melon, or apple. FFJ from grapes and/or citrus should be used only on crops of grapes or citrus, respectively. FFJ is diced or mashed fruit diluted 0.65:1 with water and 1:1 with BS/J, fermented for 4–8 days with periodic stirring. Fermented plant juice Fermented plant juice (FPJ) allows material produced by successful plants to be reincorporated into other plants. When BS/J is combined with plant material, plant juices are secreted via osmosis and microbes present on the plant material begin to break down the sugars and create ethanol. This weak alcoholic solution extracts plant components including chlorophyll. FPJ uses young sections of a fast-growing weeds that flourish in/around the fields that are undergoing cultivation or the plants to be cultivated there, harvested in the morning after a dry day. Rain may wash away microbes from the plant, inhibiting proper fermentation, and before sunrise, plant chemistry is more ideal for FPJ. Purslane and comfrey have proven effective choices, FPJ is not helpful in the presence of high precipitation and/or high nitrogen conditions. Fish amino acids Fish amino acids (FAA) provide nitrogen to enhance vegetative growth. Fish heads, guts, bones, etc. (preferably tuna or other blue-backed fish), crushed to separate flesh and bone are fermented with an equal amount of BS/J. Two to three teaspoons of IMO3 can dissolve any fat that develops on the surface. The top layer is a mixture of BS/J, IMO4, OHN, mineral A, and rice straw. Fermentation generally takes 7–10 days. Kohol amino acid Kohol amino acid (KAA) are made from the kohol or golden apple snail (Pomacea canaliculata). Pomacea canaliculata is an introduced pest in the Philippines that proliferates in rice paddies and consumes young rice seedlings. Proper water management and transplanting the rice seedlings can mitigate its effects. Due to its high protein content (12%), kohol may be used to manufacture a crop amendment referred to as kohol amino acid (KAA), as an alternative to FAA in inland regions who do not have access to affordable fish materials. The kohol has to be removed from the rice paddy anyway. The kohol are fermented in the usual way by diluting with BS/J and water and adding IMO3, after boiling to kill the animals and separate them from their shells. Fermentation takes 7–10 days after which remaining solids are removed. During storage, additional BS/J is added to nourish the IMO. Preparation and storage While each herb is fermented separately, the results are combined for use, at the ratio of 2 parts angelica to 1 part of each of the other four. Ginger and garlic must be crushed (not ground) to aid fermentation. One herb is mixed with rice wine in equal parts and fermented for 1–2 days. BS/J equal to the amount of herb is added and the mix fermented for 5–7 days. Soju, vodka or another distilled (30–35%) alcohol equal to half of the mixture is added and the mix is fermented for 14 days. Lactic acid bacteria Lactic acid bacteria (LAB) are anaerobic. In the absence of oxygen, they metabolize sugar into lactic acid. LAB improve soil ventilation, promoting rapid growth of fruit trees and leaf vegetables. LAB ferment "rice wash water" (water that has been used to wash rice), producing a sour smell when complete, then diluted and fermented again with 3-10: Water-soluble calcium Calcium (Ca) is a common substance. However, the majority exists in the form of calcium carbonate (), which cannot be directly absorbed by plants. Egg, clam, or other shells can be turned into an excellent source of bio-available, water-soluble calcium (WSCA). Adequate Ca prevents overgrowth, firms fruit, prolongs durability, promotes the absorption of phosphoric acid, helps crops to accumulate and utilize nutrients, is the major component in forming cell membranes, enables smooth cell division, and removes harmful substances by binding with organic acids. Signs of Ca deficiency include underdeveloped roots, discolored, dry leaves, empty bean pods, poor ripening, soft flesh, and insufficient fragrance. Leafy vegetables may contract Rhizoctonia, while root vegetables become spongy/hollow, lack sugar and fragrance and lack durability in storage. Rice and barley may display low starch, lack of luster and fragrance, and low resistance. WSCA is produced by grilling and crushing cleaned egg shells and steeping them in BRV until no bubbles are present. The bubbles indicate that the vinegar is reacting with organic matter to produce . Water-soluble calcium phosphate Calcium phosphate is soluble in acids, but insoluble in water. Bones including FAA leftovers can be converted into a source of bio-accessible calcium, phosphate and other minerals by boiling them to create a traditional bone broth. The (edible) broth is removed from the bone residue and the bones are burnt to charcoal at low heat. The bones are diluted with 10x BRV and steeped until the bubbling stops (7–10 days). Prior to fruiting, its principal function is to grow meristematic tissues. K promotes the synthesis of carbon dioxide fixing enzymes, decreases the diffusive resistance of in the leaf and activates various enzyme reaction systems. Potassium is highly mobile in plants. Leaf potassium content decreases rapidly during fruiting because the fruit requires substantial K. Symptoms of K deficiency include lower growth rates, smaller fruit and seed sizes, reduced root systems, disease and winterkill susceptibility and lower moisture and nitrogen absorption and content. Biochar Biochar is a porous charcoal that has been designed to produce high surface area per unit volume and small amounts of residual resins. Biochar serves as a catalyst that enhances plant uptake of nutrients and water. Its surface area and porosity enable it to adsorb or retain nutrients and water and provide a microorganism habitat. Silicon can be pulled out of basaltic rock with oxygenated water. reacts with the Si out of the rock to form (glass). The rock becomes a reddish dirt. The significant amounts of reduced iron, Fe(II), and manganese, Mn(II), present in basaltic rocks provide potential energy sources for bacteria. BMW are abundant minerals and trace elements. It promotes plant growth, improves storabilit, and deodorizes manure. Microorganism recruitment (IMO1) A cloth-covered wooden or cardboard box containing fairly dry steamed rice and a few bamboo leaves in a shady area protected from rain left 4–5 days attracts and nourishes local microorganisms. Microorganisms from a somewhat higher altitude than the target fields tend to be more robust. Successful recruitment is indicated by the presence of a white fuzz. Black, green or other prominent colors indicate unwanted strains, requiring a restart. Mixing cultures from different locations, sun exposures and weather increases diversity. Other ways to collect IMO include filling the hollow core of a freshly-cut bamboo stump with rice or placing the collection box in a rice paddy after harvest. BS/J nourishment (IMO2) Diluting the "inhabited" rice with an equal amount of BS/J or jaggery provides nourishment for microorganism growth. After the microorganisms consume the sugar (7 days) the result can be used immediately or stored. Mill run of wheat (IMO3) A mix of of IMO2 with 42.5 mL of BRV, 42.5 mL of FPJ and 21.2 mL of OHN with 30 pounds of wheat mill run or rice bran dampened with of water provides a medium for further IMO culturing. The result can be extended with of biochar. The highly porous biochar provides superior habitat for IMO flourishing and retains carbon in the soil. IMO3 is fermented in 12-inch high shaded furrows for 7 days, sheltered from rain and covered with straw mats or gunny bags, turning as needed to ensure that its internal temperature remains around . The resulting mixture's moisture level should be approximately 40%. Alternative dilutants are rice bran or rice flour. Soil (IMO4) Diluting IMO3 with an equal amount of soil, half from the field and half from a locally fertile area allows the microorganisms to reach a larger area. Alternative mixture (IMO-A) Another source recommends an alternative mixture as follows, for each hectare: == Applications ==
Applications
Soil enrichment IMO3 or IMO4 can be distributed thinly on a field, covered with a layer of mulch to retain moisture and provide a dark environment for further IMO growth. IMO-A should be applied 7 days before planting, 2–3 hours before sunset and a few hours after mixing. For unproductive fields, apply 14 days before planting. LAB (diluted 5-10000:1) solubilizes phosphate in phosphate-accumulated soil and encourages phosphate decomposition. Sun-dried salt can be applied to soil at 5 kg for every 10 acres. SoWa is chopped lye soap, boiled in water to make a thick soup and then diluted. HPW is chopped hot peppers, boiled and diluted. == Experience ==
Experience
United States In Hawaii, crop productivity increased two-fold with the use of KNF, while reducing water use by 30% and eliminating the use of pesticides. Cane grass proved to be a superior cover crop on degraded Hawaiian fields. South Korea Natural Farming was adopted by the South Korean government after successful trials growing rice in one county, where every farmer followed the practice. They increased yields, saved money on inputs and obtained a price premium. Rivers and coastal waters experienced environmental benefits. A co-op of 40 strawberry farmers used KNF exclusively in 300 foot-long greenhouses, producing increasing output and obtaining a higher price. In another experiment, farmers in an entire county used KNF to become self-sufficient, with each farm raising 500 chickens, 20 pigs and five beef cattle. Mongolia In the Gobi Desert in Mongolia, harsh wind and minimal rainfall defeated three attempts to plant trees. With KNF, the trees had a 97% survival rate and as of 2014 had reached 20 feet in height. Corn and barnyard grasses provide livestock feed. Watermelon farming provides a stable income to farmers there. China The Chinese Army feeds its service members using its own resources. For the Beijing Olympics, it brought pigs into the city, setting off violent protests over the odour. It then dispatched two officials to South Korea to study Natural Farming. KNF techniques successfully eliminated the odour. The University of Peking now offers Masters and PhD programs in KNF. == See also ==
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