Sowing is the process of planting seeds. An area that has had seeds planted in it will be described as a sowed or sown area. When sowing it is important to:
57-571: A windbreak (shelterbelt) is a planting usually made up of one or more rows of trees or shrubs planted in such a manner as to provide shelter from the wind and to protect soil from erosion . They are commonly planted in hedgerows around the edges of fields on farms . If designed properly, windbreaks around a home can reduce the cost of heating and cooling and save energy . Windbreaks are also planted to help keep snow from drifting onto roadways or yards. Farmers sometimes use windbreaks to keep snow drifts on farm land that will provide water when
114-479: A symbiotic relationship with the bacterium Bradyrhizobium japonicum ( syn. Rhizobium japonicum ; Jordan 1982). This ability to fix nitrogen allows farmers to reduce nitrogen fertilizer use and increase yields when growing other crops in rotation with soy. There may be some trade-offs, however, in the long-term abundance of organic material in soils where soy and other crops (for example, corn ) are grown in rotation. For best results, though, an inoculum of
171-520: A common pest in soybean fields, living in burrows underground and feeding nearby. One den of groundhogs can consume a tenth to a quarter of an acre of soybeans. Chemical repellents or firearms are effective for controlling pests in soybean fields. Soybeans suffer from the fungus Pythium spinosum in Arkansas and Indiana (United States), and China. In Japan and the United States,
228-488: A different genus. It originated in Africa and is now a widespread pasture crop in the tropics. Like some other crops of long domestication, the relationship of the modern soybean to wild-growing species can no longer be traced with any degree of certainty. It is a cultigen with a very large number of cultivars . Like many legumes, soybeans can fix atmospheric nitrogen , due to the presence of symbiotic bacteria from
285-505: A former East India Company sailor who had visited China in conjunction with James Flint , the first Englishman legally permitted by the Chinese authorities to learn Chinese. The first "New World" soybean crop was grown on Skidaway Island, Georgia , in 1765 by Henry Yonge from seeds given him by Samuel Bowen. Bowen grew soy near Savannah, Georgia , possibly using funds from Flint, and made soy sauce for sale to England. Although soybean
342-516: A minimum at a distance of about 3 to 5 times the windbreak's height. Beyond that point wind speed recovers, aided by the overlying, faster-moving stream. From the perspective of the Reynolds-averaged Navier–Stokes equations , these effects can be understood as resulting from the loss of momentum caused by the drag of leaves and branches and would be represented by the body force f i (a distributed momentum sink). Windbreaks reduce
399-608: A range of soluble carbohydrates protecting the seed's cell viability. Patents were awarded to him in the early 1990s on techniques for protecting biological membranes and proteins in the dry state. Together, protein and soybean oil content account for 56% of dry soybeans by weight (36% protein and 20% fat . The remainder consists of 30% carbohydrates , 9% water and 5% ash . Soybeans comprise approximately 8% seed coat or hull, 90% cotyledons and 2% hypocotyl axis or germ. The genus Glycine may be divided into two subgenera, Glycine and Soja . The subgenus Soja includes
456-516: A result, for example, in 2012 only 18 cultivars out of 807 recommended by the Iowa State University Extension had any ancestry outside of PI 88788. By 2020 the situation was still about the same: Of 849 there were 810 with some ancestry from PI 88788, 35 from Peking, and only 2 from PI 89772. (On the question of exclusively PI 88788 ancestry, that number was not available for 2020.) That was speculated to be in 2012 —and
513-480: A result, the airstream approaching the barrier is interrupted, and a portion of it moves over the barrier, resulting in a jet of higher wind speed. The remainder of the airstream then moves through the barrier to its edge downstream, pushed along by the decrease in pressure across the shelterbelt's width; as it emerges again, that airstream is interrupted further as its air pressure adjusts to the surrounding area. This results in slower wind speed further downwind, reaching
570-433: A treatment prior to the sowing process. This treatment may be seed scarification , stratification , seed soaking or seed cleaning with cold (or medium hot) water. Seed soaking is generally done by placing seeds in medium hot water for at least 24 to up to 48 hours Seed cleaning is done especially with fruit, as the flesh of the fruit around the seed can quickly become prone to attack from insects or plagues. Seed washing
627-451: A wide variety of sizes and hull colors such as black, brown, yellow, and green. Variegated and bicolored seed coats are also common. The hull of the mature bean is hard, water-resistant, and protects the cotyledon and hypocotyl (or "germ") from damage. If the seed coat is cracked, the seed will not germinate . The scar, visible on the seed coat, is called the hilum (colors include black, brown, buff, gray and yellow) and at one end of
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#1732783173988684-425: Is triggered by day length , often beginning once days become shorter than 12.8 hours. This trait is highly variable however, with different varieties reacting differently to changing day length. Soybeans form inconspicuous, self-fertile flowers which are borne in the axil of the leaf and are white, pink or purple. Though they do not require pollination, they are attractive to bees, because they produce nectar that
741-410: Is a significant and cheap source of protein for animal feeds and many packaged meals . For example, soybean products, such as textured vegetable protein (TVP), are ingredients in many meat and dairy substitutes. Soybeans contain significant amounts of phytic acid , dietary minerals and B vitamins . Soy vegetable oil , used in food and industrial applications, is another product of processing
798-535: Is also assisted when a disease-free soil is used. Especially when trying to germinate difficult seed (e.g. certain tropical fruit), prior treatment of the soil (along with the usage of the most suitable soil; e.g. potting soil , prepared soil or other substrates ) is vital. The two most used soil treatments are pasteurisation and sterilisation . Depending on the necessity, pasteurisation is to be preferred as this does not kill all organisms. Sterilisation can be done when trying to grow truly difficult crops. To pasteurise
855-582: Is considered a tertiary gene centre particularly the area encompassing Madhya Pradesh which is also the country largest soybean producer. In 1603, " Vocabvlario da Lingoa de Iapam ", a famous Japanese-Portuguese dictionary, was compiled and published by Jesuit priests in Nagasaki. It contains short but clear definitions for about 20 words related to soyfoods—the first in any European language. The Luso-Hispanic traders were familiar with soybeans and soybean product through their trade with Far East since at least
912-402: Is generally done by submerging cleansed seeds 20 minutes in 50 degree Celsius water. This (rather hot than moderately hot) water kills any organisms that may have survived on the skin of a seed. Especially with easily infected tropical fruit such as lychees and rambutans , seed washing with high-temperature water is vital. In addition to the mentioned seed pretreatments, seed germination
969-535: Is high in sugar content. Depending on the soybean variety, node growth may cease once flowering begins. Strains that continue nodal development after flowering are termed " indeterminates " and are best suited to climates with longer growing seasons. Often soybeans drop their leaves before the seeds are fully mature. The fruit is a hairy pod that grows in clusters of three to five, each pod is 3–8 cm (1–3 in) long and usually contains two to four (rarely more) seeds 5–11 mm in diameter. Soybean seeds come in
1026-440: Is placed over the seeds, as seeds can be generally sown into the soil by maintaining a planting depth of about 2-3 times the size of the seed. For hand sowing, several sowing types exist; these include: Several patterns for sowing may be used together with these types; these include: Hand sowing or (planting) is the process of casting handfuls of seed over prepared ground: broadcasting, that is, broadcast seeding (from which
1083-408: Is proportional to wind speed cubed, a reduction of wind speed of 1/2 (for example) will reduce erosion by 87.5%. Sheltered, windless areas created by windbreaks are called wind shadows. Windbreaks can mitigate the effects of pesticide drift . When wind encounters a porous obstacle, such as a windbreak or shelterbelt, air pressure increases on the windward side and decreases on the leeward side. As
1140-503: Is the worst pest of soybean in the US. Losses of 30% or 40% are common even without symptoms. The corn earworm moth and bollworm (Helicoverpa zea) is a common and destructive pest of soybean growth in Virginia. Soybeans are consumed by whitetail deer which may damage soybean plants through feeding, trampling and bedding, reducing crop yields by as much as 15%. Groundhogs are also
1197-439: Is typical, though rates vary considerably depending on crop species, soil conditions, and farmer's preference. Excessive rates can cause the crop to lodge, while too thin a rate will result in poor utilisation of the land, competition with weeds and a reduction in the yield . Open-field planting refers to the form of sowing used historically in the agricultural context whereby fields are prepared generically and left open, as
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#17327831739881254-469: Is volumetric in nature; individual seeds are not counted. Rows are typically about 10–30 cm apart, depending on the crop species and growing conditions. Several row opener types are used depending on soil type and local tradition. Grain drills are most often drawn by tractors , but can also be pulled by horses . Pickup trucks are sometimes used, since little draft is required. A seed rate of about 100 kg of seed per hectare (2 bushels per acre)
1311-544: The Cerrado region of Brazil into highly productive cropland that could grow profitable soybeans. Human sewage sludge can be used as fertilizer to grow soybeans. Soybeans grown in sewage sludge likely contain elevated concentrations of metals. Soybean plants are vulnerable to a wide range of bacterial diseases , fungal diseases , viral diseases , and parasites. The primary bacterial diseases include bacterial blight , bacterial pustule and downy mildew affecting
1368-522: The Rhizobia group. Cultivation is successful in climates with hot summers, with optimum growing conditions in mean temperatures of 20 to 30 °C (70 to 85 °F); temperatures of below 20 °C (70 °F) and over 40 °C (105 °F) stunt growth significantly. They can grow in a wide range of soils, with optimum growth in moist alluvial soils with good organic content. Soybeans, like most legumes, perform nitrogen fixation by establishing
1425-633: The Soybean dwarf virus (SbDV) causes a disease in soybeans and is transmitted by aphids. Resistant varieties are available. In Indian cultivars, Nataraj et al. 2020 find that anthracnose caused by Colletotrichum truncatum is resisted by a combination of 2 major genes. The vast majority of cultivars in the US have soybean cyst nematode resistance (SCN resistance), but rely on only one breeding line (PI 88788) as their sole source of resistance. (The resistance genes provided by PI 88788, Peking , and PI 90763 were characterized in 1997.) As
1482-474: The technological term is derived). Usually, a drag or harrow is employed to incorporate the seed into the soil. Though labor-intensive for any but small areas, this method is still used in some situations. Practice is required to sow evenly and at the desired rate. A hand seeder can be used for sowing, though it is less of a help than it is for the smaller seeds of grasses and legumes . Hand sowing may be combined with pre-sowing in seed trays . This allows
1539-608: The 13th century, the soybean had arrived and cultivated in Indonesia; it probably arrived much earlier however, carried by traders or merchants from Southern China. The earliest known reference to it as " tempeh " appeared in 1815 in the Serat Centhini manuscript. The development of tempeh fermented soybean cake probably took place earlier, circa 17th century in Java. By the 1600s, soy sauce spread from southern Japan across
1596-541: The 17th century through their trade with Far East, soybeans and its products were traded by European traders (Portuguese, Spanish, and Dutch) in Asia, and reached Indian Subcontinent by this period. By the 18th century, soybeans were introduced to the Americas and Europe from China. Soy was introduced to Africa from China in the late 19th century, and is now widespread across the continent. The cultivation of soybeans began in
1653-850: The 17th century. However, it was not until the late 19th century that the first attempt to cultivate soybeans in the Iberian peninsula was undertaken. In 1880, the soybean was first cultivated in Portugal in the Botanical Gardens at Coimbra (Crespi 1935). In about 1910 in Spain the first attempts at Soybean cultivation were made by the Count of San Bernardo, who cultivated soybeans on his estates at Almillo (in southwest Spain) about 48 miles east-northeast of Seville. Soybeans were first introduced to North America from China in 1765, by Samuel Bowen ,
1710-471: The Amazon not covered by the moratorium, such as the Cerrado region. Roughly one-fifth of deforestation can be attributed to expanding land use to produce oilseeds, primarily for soy and palm oil , whereas the expansion of beef production accounts for 41%. The main driver of deforestation is the global demand for meat, which in turn requires huge tracts of land to grow feed crops for livestock. Around 80% of
1767-619: The Early Mumun period Okbang site in Korea indicated soybean was cultivated as a food crop in around 1000–900 BC. Soybeans from the Jōmon period in Japan from 3000 BC are also significantly larger than wild varieties. Soybeans were mentioned as kadêlê (modern Indonesian term: kedelai ) in an old Javanese manuscript, Serat Sri Tanjung , which dates to 12th- to 13th-century Java . By
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1824-500: The ancient Chinese myth, in 2853 BC, the legendary Emperor Shennong of China proclaimed that five plants were sacred: soybeans, rice, wheat, barley, and millet . Early Chinese records mention that soybeans were a gift from the region of Yangtze River delta and Southeast China. The Great Soviet Encyclopedia claims soybean cultivation originated in China about 5000 years ago. Some scholars suggest that soybean originated in China and
1881-435: The correct strain of bacteria should be mixed with the soybean (or any legume) seed before planting. Modern crop cultivars generally reach a height of around 1 m (3 ft), and take 80–120 days from sowing to harvesting. Soil scientists Edson Lobato (Brazil), Andrew McClung (U.S.), and Alysson Paolinelli (Brazil) were awarded the 2006 World Food Prize for transforming the ecologically biodiverse savannah of
1938-468: The crops from the wind. Alley cropping has been particularly successful in India, Africa, and Brazil, where coffee growers have combined farming and forestry. A further use for a shelterbelt is to screen a farm from a main road or motorway. This improves the farm landscape by reducing the visual incursion of the motorway, mitigating noise from the traffic and providing a safe barrier between farm animals and
1995-574: The cultivated soybean, G. max , and the wild soybean, treated either as a separate species G. soja , or as the subspecies G. max subsp. soja . The cultivated and wild soybeans are annuals . The wild soybean is native to China , Japan , Korea and Russia . The subgenus Glycine consists of at least 25 wild perennial species: for example, G. canescens and G. tomentella , both found in Australia and Papua New Guinea . Perennial soybean ( Neonotonia wightii ) belongs to
2052-498: The eastern half of northern China by 2000 BC, but is almost certainly much older. The earliest documented evidence for the use of Glycine of any kind comes from charred plant remains of wild soybean recovered from Jiahu in Henan province China, a Neolithic site occupied between 9000 and 7800 calendar years ago (cal bp). An abundance of archeological charred soybean specimens have been found centered around this region. According to
2109-901: The first 48 hours under ideal growing conditions. The first photosynthetic structures, the cotyledons , develop from the hypocotyl , the first plant structure to emerge from the soil. These cotyledons both act as leaves and as a source of nutrients for the immature plant, providing the seedling nutrition for its first 7 to 10 days. The first true leaves develop as a pair of single blades . Subsequent to this first pair, mature nodes form compound leaves with three blades. Mature trifoliolate leaves, having three to four leaflets per leaf, are often between 6 and 15 cm ( 2 + 1 ⁄ 2 and 6 in) long and 2 and 7 cm (1 and 3 in) broad. Under ideal conditions, stem growth continues, producing new nodes every four days. Before flowering, roots can grow 2 cm ( 3 ⁄ 4 in) per day. If rhizobia are present, root nodulation begins by
2166-592: The global soybean crop is used to feed livestock. Soybeans were a crucial crop in East Asia long before written records began. The origin of soy bean cultivation remains scientifically debated. The closest living relative of the soybean is Glycine soja (previously called G. ussuriensis ), a legume native to central China. There is evidence for soybean domestication between 7000 and 6600 BC in China, between 5000 and 3000 BC in Japan and 1000 BC in Korea. The first unambiguously domesticated, cultigen -sized soybean
2223-518: The hilum is the micropyle , or small opening in the seed coat which can allow the absorption of water for sprouting. Some seeds such as soybeans containing very high levels of protein can undergo desiccation , yet survive and revive after water absorption. A. Carl Leopold began studying this capability at the Boyce Thompson Institute for Plant Research at Cornell University in the mid-1980s. He found soybeans and corn to have
2280-518: The industry has been primarily fueled by large increases in worldwide demand for meat products, particularly in developing countries like China, which alone accounts for more than 60% of imports. In spite of the Amazon "Soy Moratorium", soy production continues to play a significant role in deforestation when its indirect impacts are taken into account, as land used to grow soy continues to increase. This land either comes from pasture land (which increasingly supplants forested areas), or areas outside
2337-557: The name suggests, before being sown directly with seed. The seed is frequently left uncovered at the surface of the soil before germinating and therefore exposed to the prevailing climate and conditions like storms etc. This is in contrast to the seedbed method used more commonly in domestic gardening or more specific (modern) agricultural scenarios where the seed is applied beneath the soil surface and monitored and manually tended frequently to ensure more successful growth rates and better yields. Before sowing, certain seeds first require
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2394-400: The plants to come to strength indoors during cold periods (e.g. spring in temperate countries). In agriculture , most seed is now sown using a seed drill , which offers greater precision; seed is sown evenly and at the desired rate. The drill also places the seed at a measured distance below the soil, so that less seed is required. The standard design uses a fluted feed metering system, which
2451-585: The region through the Dutch East India Company (VOC). While the origins and history of Soybean cultivation in the Eastern Himalayas is debated, it was potentially introduced from southern China , more specifically Yunnan province. Alternatively, it could have reached here through traders from Indonesia via Myanmar . Northeast India is viewed as a passive micro-centre within the soybean secondary gene centre. Central India
2508-475: The road. Fences called "windbreaks" are also used. Normally made from cotton , nylon , canvas , and recycled sails, windbreaks tend to have three or more panels held in place with poles that slide into pockets sewn into the panel. The poles are then hammered into the ground and a windbreak is formed. Windbreaks or "wind fences" are used to reduce wind speeds over erodible areas such as open fields, industrial stockpiles, and dusty industrial operations. As erosion
2565-526: The snow melts in the spring. Other benefits include contributing to a microclimate around crops (with slightly less drying and chilling at night), providing habitat for wildlife, and, in some regions, providing wood if the trees are harvested. Windbreaks and intercropping can be combined in a farming practice referred to as alley cropping , or being deployed along riparian buffer stripes. Fields are planted in rows of different crops surrounded by rows of trees. These trees provide fruit, wood, or protect
2622-496: The soil, the soil is heated for 15 minutes in an oven of 120 °C. Soybean The soybean , soy bean , or soya bean ( Glycine max ) is a species of legume native to East Asia , widely grown for its edible bean , which has numerous uses. Traditional unfermented food uses of soybeans include soy milk , from which tofu and tofu skin are made. Fermented soy foods include soy sauce , fermented bean paste , nattō , and tempeh . Fat-free (defatted) soybean meal
2679-462: The soybean crop. Soybean is a common protein source in feed for farm animals that in turn yield animal protein for human consumption. The word "soy" derives from the Japanese soi , a regional variant of shōyu , meaning "soy sauce". The name of the genus, Glycine , comes from Linnaeus . When naming the genus, Linnaeus observed that one of the species within the genus had a sweet root. Based on
2736-414: The soybean plant. The Japanese beetle ( Popillia japonica ) poses a significant threat to agricultural crops, including soybeans, due to its voracious feeding habits. Found commonly in both urban and suburban areas, these beetles are frequently observed in agricultural landscapes where they can cause considerable damage to crops like corn, soybeans, and various fruits. Soybean cyst nematode (SCN)
2793-472: The sweetness, the Greek word for sweet, glykós , was Latinized. The genus name is not related to the amino acid glycine . Like most plants, soybeans grow in distinct morphological stages as they develop from seeds into fully mature plant. The first stage of growth is germination , a method which first becomes apparent as a seed's radicle emerges. This is the first stage of root growth and occurs within
2850-461: The time the third node appears. Nodulation typically continues for 8 weeks before the symbiotic infection process stabilizes. The final characteristics of a soybean plant are variable, with factors such as genetics, soil quality , and climate affecting its form; however, fully mature soybean plants are generally between 50 and 125 cm (20 and 50 in) in height and have rooting depths between 75 and 150 cm (30 and 60 in). Flowering
2907-422: The wind's average air speed and make it less variable, resulting in the wind mixing less effectively than it does upwind. Additionally, all these changes to the wind's behavior result in changes to the region's environment. For instance, the surface energy budget of the ground may be impacted, as the slowed wind dissipates heat from the sun less effectively; this trend may reverse further downwind, and about 8 times
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#17327831739882964-522: The windbreak's height downstream, the windbreak may result in cooler surface temperatures. Planting Among the major field crops, oats , wheat , and rye are sown, grasses and legumes are seeded and maize and soybeans are planted. In planting, wider rows (generally 75 cm (30 in) or more) are used, and the intent is to have precise; even spacing between individual seeds in the row, various mechanisms have been devised to count out individual seeds at exact intervals. In sowing, little if any soil
3021-489: Was clearly by 2020 —producing SCN populations that are virulent on PI 88788. In 2020, world production of soybeans was over 353 million tonnes, led by Brazil and the United States combined with 66% of the total (table). Production has dramatically increased across the globe since the 1960s, but particularly in South America after a cultivar that grew well in low latitudes was developed in the 1980s. The rapid growth of
3078-564: Was discovered in Korea at the Mumun -period Daundong site. Prior to fermented products such as fermented black soybeans ( douchi ), jiang (Chinese miso), soy sauce , tempeh , nattō , and miso , soy was considered sacred for its beneficial effects in crop rotation , and it was eaten by itself, and as bean curd and soy milk . Soybeans were introduced to Java in Malay Archipelago circa 13th century or probably earlier. By
3135-453: Was domesticated about 3500 BC. Recent research, however, indicates that seeding of wild forms started early (before 5000 BC) in multiple locations throughout East Asia. Soybeans became an important crop by the Zhou dynasty (c. 1046–256 BC) in China. However, the details of where, when, and under what circumstances soybean developed a close relationship with people are poorly understood. Soybean
3192-548: Was introduced into North America in 1765, for the next 155 years, the crop was grown primarily for forage . In 1831, the first soy product "a few dozen India Soy" [sauce] arrived in Canada. Soybeans were probably first cultivated in Canada by 1855, and definitely in 1895 at Ontario Agricultural College . It was not until Lafayette Mendel and Thomas Burr Osborne showed that the nutritional value of soybean seeds could be increased by cooking, moisture or heat, that soy went from
3249-907: Was unknown in South China before the Han period. From about the first century AD to the Age of Discovery (15–16th centuries), soybeans were introduced into across South and Southeast Asia. This spread was due to the establishment of sea and land trade routes. The earliest Japanese textual reference to the soybean is in the classic Kojiki ( Records of Ancient Matters ), which was completed in AD 712. The oldest preserved soybeans resembling modern varieties in size and shape were found in archaeological sites in Korea dated about 1000 BC. Radiocarbon dating of soybean samples recovered through flotation during excavations at
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