Hemp (from Old English hænep) is a term reserved mainly for low tetrahydrocannabinol (THC) strains of the plant Cannabis sativa. Of the approximately 2000 cannabis plants varieties known, about 90% contain only low-grade THC and are most useful for their fiber, seeds and medicinal or psychoactive oils. Scholars believe that hemp is humankind's oldest cloth and hemp-limestone composites have been found in ancient Roman architecture.
In modern times hemp is used for industrial purposes including paper, textiles, clothing, biodegradable plastics, construction (as with Hemcrete and insulation), body products, health food and bio-fuel. Hemp is thus legally grown in many countries across the world including Spain, China, Japan, Korea, England, France, Africa, North Africa, Egypt and Ireland. Although hemp is commonly associated with marijuana (hemp's THC rich cousin), [1][2][3] since 2007 the commercial success of hemp food products has grown considerably.[4][5]
Hemp is one of the faster growing biomasses known,[6] producing up to 25 tonnes of dry matter per hectare per year.[7] A typical average yield in large scale modern agriculture is about 2.5–3.5 t/ac (air dry stem yields of dry, retted stalks per acre at 12% moisture). Approximately one tonne of bast fiber and 2–3 tonnes of core material can be decorticated from 3–4 tonnes of good quality, dry retted straw.[8][9]
Hemp is very environmentally friendly as it requires few pesticides and no herbicides. It has been called a carbon-negative raw material.[10][11] Results indicate that high yield of hemp may require high total nutrient levels (field plus fertilizer nutrients) similar to a high yielding wheat crop.[12]
Hemp is one of the earliest domesticated plants known.[13]
Cannabis sativa L. subsp. sativa var. sativa is the variety grown for industrial use, while C. sativa subsp. indica generally has poor fiber quality and is primarily used for recreational and medicinal purposes. The major difference between the two types of plants is the appearance and the amount of Δ9-tetrahydrocannabinol (THC) secreted in a resinous mixture by epidermal hairs called glandular trichomes, although they can also be distinguished genetically.[14] Oilseed and fiber varieties of Cannabis approved for industrial hemp production produce only minute amounts of this psychoactive drug, not enough for any physical or psychological effects. Typically, hemp contains below 0.3% THC, while cultivars of Cannabis grown for recreational use can contain anywhere from 2% to over 20%.[15]
The world leading producer of hemp is China with smaller production in Europe, Chile and North Korea.[16] While more hemp is exported to the United States than to any other country, the United States Government does not consistently distinguish between marijuana and the non-psychoactive Cannabis used for industrial and commercial purposes.[15]
Hemp grown for milk animal
fodder
Hemp is used for a wide variety of purposes including the manufacture of cordage of varying tensile strength, durable clothing and nutritional products. The bast fibers can be used in 100% hemp products, but are commonly blended with other organic fibers such as flax, cotton or silk, for apparel and furnishings, most commonly at a 55%/45% hemp/cotton blend. The inner two fibers of hemp are more woody and are more often used in non-woven items and other industrial applications, such as mulch, animal bedding and litter. The oil from the fruits ("seeds") oxidizes (commonly, though inaccurately, called "drying") to become solid on exposure to air, similar to linseed oil, and is sometimes used in the manufacture of oil-based paints, in creams as a moisturizing agent, for cooking, and in plastics. Hemp seeds have been used in bird seed mix as well.[17] Hempseed is also used as a fishing bait.[18]
Hemp seeds can be eaten raw, ground into a meal, sprouted, made into hemp milk (akin to soy milk), prepared as tea,[19] and used in baking. The fresh leaves can also be consumed in salads. Products include cereals, frozen waffles, hemp tofu, and nut butters. A few companies produce value added hemp seed items that include the seed oils, whole hemp grain (which is sterilized by law in the United States, where they import it from China and Canada), dehulled hemp seed (the whole seed without the mineral rich outer shell), hemp flour, hemp cake (a by-product of pressing the seed for oil) and hemp protein powder. Hemp is also used in some organic cereals, for non-dairy milk[20] somewhat similar to soy and nut milks, and for non-dairy hemp "ice cream."
Within the UK, the Department for Environment, Food and Rural Affairs (Defra) has treated hemp as purely a non-food crop. Seed appears on the UK market as a legal food product, and cultivation licenses are available for this purpose. In North America, hemp seed food products are sold, typically in health food stores or through mail order. The United States Department of Agriculture estimates that "the market potential for hemp seed as a food ingredient is unknown. However, it probably will remain a small market, like those for sesame and poppy seeds."[21]
A survey in 2003 showed that more than 95% of hemp seed sold in the EU was used for animal feed (bird seed, bait for fishing).[9]
Approximately 44% of the weight of hempseed is edible oils, containing about 80% essential fatty acids (EFAs); e.g., linoleic acid, omega-6 (LA, 55%), alpha-linolenic acid, omega-3 (ALA, 22%), in addition to gamma-linolenic acid, omega-6 (GLA, 1–4%) and stearidonic acid, omega-3 (SDA, 0–2%). Proteins (including edestin) are the other major component (33%), second only to soy (35%).
Hempseed's amino acid profile is close to "complete"[clarification needed] when compared to more common sources of proteins such as meat, milk, eggs and soy.[23] The proportions of linoleic acid and alpha-linolenic acid in one tablespoon (15 ml) per day of hemp oil easily provides human daily requirements for EFAs.
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Japanese hemp seed seasoning
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German hemp beer uses blossoms
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Hemp oil can spontaneously oxidize and turn rancid within a short period of time if not stored properly; it is best stored in a dark glass bottle, in a refrigerator or freezer (its freezing point is –20 °C). Preservatives (antioxidants) are not necessary for high quality oils that are stored properly.
Hemp seed contains a large dietary supplement of omega-3, higher even than walnuts which contain 6.3% of n-3.
Hemp seed has a very nutty flavour, very similar to sunflower seeds. Although a bit expensive compared to other common grains, hemp seeds complement a 'trail mix' of assorted seeds, grains, nuts and dried fruits[citation needed].
Hemp oil has anti-inflammatory properties.[24]
Hemp stem showing fibers.
The fiber is the most valuable parts of the hemp plant. It is commonly called bast, which refers to the fibers that grow on the outside of the woody interior of the plant's stalk, and under the outermost part (the bark). Bast fibers give the plant's strength. Hemp fibers can be between approximately 0.91 m (3 ft) and 4.6 m (15 ft) long, running the length of the plant. Depending on the processing used to remove the fiber from the stem, the hemp may naturally be creamy white, brown, gray, black or green.[citation needed]
The use of hemp for fiber production has declined sharply over the last two centuries, but before the industrial revolution, hemp was a popular fiber because it is strong and grows quickly. It produces roughly 10% more fiber than cotton or flax when grown on the same land.[citation needed] Because hemp has hollow fibers and cotton does not, hemp clothing better regulates body temperature. Hemp fiber also has anti-microbial properties, making it useful not only in clothing, bedding, and upholstery but also in medical bandages.
Hemp has been used to make paper but the paper industry has switched over to wood pulp.[citation needed]
It was often used to make sail canvas, and the word canvas derives from cannabis.[25][26]
Abaca, or "Manila hemp", a relative of the banana plant, replaced its use for rope.[citation needed]
Burlap, made from jute, took over the sacking market.[citation needed]
The carpet industry switched over to wool, sisal, and jute, then nylon.[citation needed]
Netting and webbing applications were taken over by cotton and synthetics.[citation needed]
Hemp is still a traditional choice for seals in water plumbing, but is competing with Teflon and other synthetic materials.[citation needed]
Concrete-like blocks made with hemp and lime have been used as an insulating material for construction. Such blocks are not strong enough to be used for structural elements; they must be supported by a brick, wood, or steel frame.[27]
The first example of the use of hempcrete was in 1986 in France with the renovation of the Maison de la Turque in Nogent-sur-Seine by the innovator Charles Rasetti.[28] The Renewable House was the UK's first home made from hemp-based materials.[29] Construction was completed in 2009. The first US home made of hemp-based materials was completed in August 2010 in Asheville, North Carolina.[30]
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Hemp interior thermal insulation blocks
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Hemp acoustic ceiling insulation
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Main article:
hemp plasticA mixture of fibreglass, hemp fiber, kenaf, and flax has been used since 2002 to make composite panels for automobiles.[4][31] The choice of which bast fiber to use is primarily based on cost and availability. Various car makers are beginning to use hemp in their cars, including Audi, BMW, Ford, GM, Chrysler, Honda, Iveco, Lotus, Mercedes, Mitsubishi, Porsche, Saturn, Volkswagen[32] and Volvo. The Lotus Eco Elise has hemp in it.[33] The Mercedes C-Class has up to 20 kg of hemp in each car.
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Hemp plastic interior of a car door
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Hemp plastic automobile glove box
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Hemp plastic column, automobile
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Hemp composite sink basin
Wrapping paper with hemp fiber excavated from the Han Tomb of
Wu Di (140-87 BC) at
Baqiao, Xi'An
The first identified coarse paper, made from hemp, dates to the early Western Han Dynasty, two hundred years before the nominal invention of papermaking by Cai Lun, who improved and standardized paper production using a range of inexpensive materials, including hemp ends, approximately 2000 years ago.[34] Recycled hemp clothing, rags and fishing nets were used as inputs for paper production.
The Saint Petersburg, Russia paper mill of Goznak opened in 1818. It used hemp as its main input material. Paper from the mill was used in the printing of "bank notes, stamped paper, credit bills, postal stamps, bonds, stocks, and other watermarked paper."[35]
In 1916, U.S. Department of Agriculture chief scientists Lyster Hoxie Dewey and Jason L. Merrill created paper made from hemp pulp and concluded that paper from hemp hurds was "favorable in comparison with those used with pulp wood."[36][37] Modern research has not confirmed the positive finding about hemp hurds. They are only 32% and 38% cellulose.[38] The actual production of hemp fiber in the U.S continued to decline until 1933 to around 500 tons/year. Between 1934-35, the cultivation of hemp began to increase but still at a very low level and with no significant increase of paper from hemp.[39][40]
Hemp has never been used for commercial high-volume paper production due to its relatively high processing cost.[41] Currently there is a small niche market for hemp pulp, for example as cigarette paper.[42] Hemp fiber is mixed with fiber from other sources than hemp. In 1994 there was no significant production of 100% true hemp paper.[43] World hemp pulp production was believed to be around 120,000 tons per year in 1991 which was about 0.05% of the world's annual pulp production volume.[2] The total world production of hemp fiber had in 2003 declined to about 60 000 to 80 000 tons.[42] This can be compared to a typical pulp mill for wood fiber, which is never smaller than 250,000 tons per annum.[43][44] The cost of hemp pulp is approximately six times that of wood pulp,[2] mostly because of the small size and outdated equipment of the few hemp processing plants in the Western world, and because hemp is harvested once a year (during August) and needs to be stored to feed the mill the whole year through. This storage requires a lot of (mostly manual) handling of the bulky stalk bundles. Another issue is that the entire hemp plant cannot be economically prepared for paper production. While the wood products industry uses nearly 100% of the fiber from harvested trees, only about 25% of the dried hemp stem — the bark, called bast — contains the long, strong fibers desirable for paper production. [45] All this accounts for a high raw material cost. Hemp pulp is bleached with hydrogen peroxide, a process today also commonly used for wood pulp.
Today, hemp paper for cigarettes, among other things, is produced in Spain and the UK. Around the year 2000, the production quantity of flax and hemp pulp total 25000-30000 tons per year, having been produced from approximately 37000-45000 tonnes fibers. Up to 80% of the produced pulp is used for specialty papers (including 95% of cigarette paper). Only about 20% hemp fiber input goes into the standard pulp area and are here mostly in lower quality (untreated oakum high shive content added) wood pulps. With hemp pulp alone, the proportion of specialty papers probably at about 99%. The market is considered saturated with little or no growth in this area.
- Ivan Bócsa, Michael Karus, Daike Lohmeyer: The cultivation of hemp. Botany, varieties, cultivation and harvesting, markets and product lines. 2 support, agricultural Verlag GmbH, Münster 2000th
- Michael Carus et al.. Study of market and competition for natural fibers and natural fiber materials (Germany and EU) trade talks Gülzower 26, ed. of the Agency of Renewable Resources, Gülzow 2008 Download nova-Institut (ed.): The small hemp-Lexikon Verlag The Workshop, Göttingen, 2. Edition, 2003, page 79 ISBN 3-89533-271-2
Main article:
Hemp jewelryHemp jewelry is the product of knotting hemp twine through the practice of macramé. Hemp jewelry includes bracelets, necklaces, anklets, rings, watches and other adornments. Some jewelry features beads made from glass, stone, wood and bones. The hemp twine varies in thickness and comes in a variety of colors. There are many different stitches used to create hemp jewelry, however, the half knot and full knot stitches are most common.
A modest hemp fabric industry exists, and hemp fibers can be used in clothing.[46] Pure hemp has a texture similar to linen.[47]
Hemp rope was used in the age of sailing ships, though the rope had to be protected by tarring, since hemp rope has a propensity for breaking from rot, as the capillary effect of the rope-woven fibers tended to hold liquid at the interior, while seeming dry from the outside.[48] Tarring was a labor-intensive process, and earned sailors the nickname "Jack Tar". Hemp rope was phased out when Manila, which does not require tarring, became widely available. Manila is sometimes referred to as Manila hemp, but is not related to hemp; it is abacá, a species of banana.
Hemp straw animal bedding
Hemp shives are the core of the stem, hemp hurds are broken parts of the core. In the EU, they are used for animal bedding (horses, for instance), or for horticultural mulch.[49] Industrial hemp is much more profitable if both fibers and shives (or even seeds) can be used.
Hemp can be used as a "mop crop" to clear impurities out of wastewater, such as sewage effluent, excessive phosphorus from chicken litter, or other unwanted substances or chemicals. Eco-technologist Dr. Keith Bolton from Southern Cross University in Lismore, New South Wales, Australia, is a leading researcher in this area. Hemp is being used to clean contaminants at the Chernobyl nuclear disaster site. This is known as phytoremediation-the process by the cleaning radiation as well as a variety of other toxins from the soil, water, and air.[50]
The dense growth of hemp helps kill weeds, even
thistle.
Hemp, because of its height, dense foliage and its high planting density as a crop, is a very effective and long used method of killing tough weeds in farming by minimizing the pool of weed seeds of the soil.[51] Using hemp this way can help farmers avoid the use of herbicides, to help gain organic certification and to gain the benefits of crop rotation per se. Due to its rapid, dense growth characteristics, in some jurisdictions hemp is considered a prohibited noxious weed, much like Scotch Broom. It has been used extensively to kill weeds in agriculture.
Biofuels, such as biodiesel and alcohol fuel, can be made from the oils in hemp seeds and stalks, and the fermentation of the plant as a whole, respectively. Biodiesel produced from hemp is sometimes known as "hempoline".[52]
Filtered hemp oil can be used directly to power diesel engines. In 1892, Rudolf Diesel invented the diesel engine, which he intended to fuel "by a variety of fuels, especially vegetable and seed oils, which earlier were used for oil lamps, i.e. the Argand lamp."[53][54][55]
Production of vehicle fuel from hemp is very small. Commercial biodiesel and biogas is typically produced from cereals, coconuts, palmseeds and cheaper raw materials like garbage, wastewater, dead plant and animal material, animal feces and kitchen waste.[56]
Hemp is usually planted between March and May in the northern hemisphere, between September and November in the southern hemisphere.[57] It matures in about three to four months. Millennia of selective breeding have resulted in varieties that look quite different. Also, breeding since circa 1930 has focused quite specifically on producing strains which would perform very poorly as sources of drug material. Hemp grown for fiber is planted closely, resulting in tall, slender plants with long fibers.[citation needed] Ideally, according to Britain's Department for Environment, Food and Rural Affairs, the herb should be harvested before it flowers. This early cropping is done because fiber quality declines if flowering is allowed and, incidentally, this cropping also pre-empts the herb's maturity as a potential source of drug material.[citation needed] However, in these strains of industrial hemp the tetrahydrocannabinol (THC) content would have been very low, regardless.
The seeds are sown from mid April to mid May with grain drills to 4–6 cm sowing depth. Hemp needs less fertilizer than corn does. A total of 60–150 kg of nitrogen, 40–140 kg phosphorus (P2O5) and 75–200 kg of potassium [5] per acre for hemp fiber made before sowing and again later, maybe three to four weeks . When practiced, especially in France double use of fiber and seed fertilization with nitrogen doses up to 100 kg / ha rather low. Organic fertilizers such as manure can utilize industrial hemp well. Neither weeds nor crop protection measures are necessary.[citation needed]
Industrial hempseed harvesting machine in France.
Smallholder plots are usually harvested by hand. The plants are cut at 2 to 3 cm above the soil and left on the ground to dry. Mechanical harvesting is now common, using specially adapted cutter-binders or simpler cutters.
The cut hemp is laid in swathes to dry for up to four days. This was traditionally followed by retting, either water retting (the bundled hemp floats in water) or dew retting (the hemp remains on the ground and is affected by the moisture in dew, and by molds and bacterial action). Modern processes use steam and machinery to separate the fiber, a process known as thermomechanical pulping.
For profitable hemp farming, particularly deep, humus-rich, nutrient-rich soil with controlled water flow is preferable. Water logged acidic, compressed or extremely light (sandy) soils primarily affect the early development of plants. Steep slopes and high altitudes of more than 400 m above sea level are best avoided. Hemp is relatively insensitive to cold temperatures and can withstand frost down to -5 degrees C. Seeds can germinate down to 1-3 degrees. Hemp needs a lot of heat, so earlier varieties come to maturation. The water requirement is 300-500 l / kg dry matter is relatively high, up to 3 feet growing roots into the soil can also use water supplies from deeper soil layers.
Hemp benefits crops grown after it. For this reason it is generally grown before winter cereals. Advantageous changes are high weed suppression, soil loosening by the large hemp root system and the positive effect on soil tilth. Since hemp is very self-compatible, it can also be grown several years in a row in the same fields (monoculture).
Hemp has been grown for millennia in Asia and the Middle East for its fibre. Commercial production of hemp in the West took off in the eighteenth century, but was grown in the sixteenth century in eastern England.[58] Because of colonial and naval expansion of the era, economies needed large quantities of hemp for rope and oakum. Other important producing countries were China, North Korea, Hungary, the former Yugoslavia, Romania, Poland, France and Italy.
In Western Europe, nobody banned the cultivation of hemp in the 1930s but the commercial cultivation ceased almost anyhow in the decades after the 1930s. Hemp was simply ousted by artificial fibres.[59]
Harvesting hemp in the USSR, 1956
From the 1950s to the 1980s, the Soviet Union was the world's largest producer (3,000 km² in 1970). The main production areas were in Ukraine,[60] the Kursk and Orel regions of Russia, and near the Polish border. Since its inception in 1931, the Hemp Breeding Department at the Institute of Bast Crops in Hlukhiv (Glukhov), Ukraine, has been one of the world's largest centers for developing new hemp varieties, focusing on improving fiber quality, per-hectare yields, and low THC content.[61][62]
In Japan, hemp was historically used as paper and a fiber crop. There is archaeological evidence cannabis was used for clothing and the seeds were eaten in Japan back to the Jōmon period (10,000 to 300 BCE). Many Kimono designs portray hemp, or asa (Japanese: 麻), as a beautiful plant. In 1948, marijuana was restricted as a narcotic drug. The ban on marijuana imposed by the United States authorities was alien to Japanese culture, as the drug had never been widely used in Japan before. Though these laws against marijuana are some of the world's strictest, allowing five years imprisonment for possession of the drug, they exempt hemp growers, whose crop is used to make robes for Buddhist monks and loincloths for Sumo wrestlers. Because marijuana use in Japan has doubled in the past decade, these exemptions have recently been called into question.[63]
The cultivation of hemp in Portuguese lands began around the fourteenth century onwards, it was raw material for the preparation of rope and plugs for the Portuguese ships. Colonies for factories for the production of flax hemp, such as the Royal Flax Hemp Factory in Brazil .
After the Restoration of Independence in 1640, in order to recover the ailing Portuguese naval fleet, were encouraged its cultivation as the Royal Decree of D. John IV in 1656 . At that time its cultivation was carried out in Trás-os-Montes, Zone Tower Moncorvo, more precisely in Vilariça Valley, fertile land for any crop irrigation, and a very large area, flat and very fertile culture still wide until the last century grew up tobacco, a plant that needs a large space to expand and grow, the area lies in the valley of Serra de Bornes.
In 1971 this cultivar is considered illegal because of marijuana, a decision subsequently revoked by the European Union .
Dried hemp stalks displayed at the International Hemp Fair in
Vienna
Air dry stem yields in Ontario have from 1998 and onward ranged from 2.6-14.0 tonnes of dry, retted stalks per hectare (1-5.5 t/ac) at 12% moisture. Yields in Kent County, have averaged 8.75 t/ha (3.5 t/ac). Northern Ontario crops averaged 6.1 t/ha (2.5 t/ac) in 1998. Statistic for the European Union for 2008 to 2010 say that the average yield of hemp straw has varied between 6.3 and 7.3 ton per ha.[64] Only a part of that is bast fiber. Approximately one tonne of bast fiber and 2-3 tonnes of core material can be decorticated from 3-4 tonnes of good quality, dry retted straw.[8] For an annual yield of this level is it in Ontario recommended to add nitrogen (N):70–110 kg/ha, phosphate (P2O5): up to 80 kg/ha and potash (K2O): 40–90 kg/ha.[8] The average yield of dry hemp stalks in Europe was 6 ton/ha (2.4 ton/ac) in 2001 and 2002.[9]
FAO argue that an optimum yield of hemp fiber is more than 2 tonnes per ha, while average yields are around 650 kg/ha.[16]
There are a lot of very uncertain, easily misleading and sometimes clearly incorrect numbers about the yield from hemp in ton/hectare or pounds/acre etc. on the Internet. Frequently it is not specified if the numbers describe: the total biomass; the total yield of biomass; the total yield of dried stalk; or the total yield of fiber from the bark. Furthermore, it is frequently not specified whether the numbers measure wet or dry material. Hemp can contain a lot of water. [65] In modern industrial agriculture is about 42% of the plants' biomass returned to the soil in the form of leaves, roots and tops.[8]
Hemp strains USO-xx and Zolotoniski-xx
A total of 41 varieties of hemp with low levels of tetrahydrocannabinol (THC) are certified by the European Union (EU).[66] They have, unlike other types, a very high fiber content of 30-40%. In contrast to cannabis for medical use, varieties grown for fiber and seed have less than 0.2% THC and they are unsuitable for producing hashish and marijuana.[67] The most important cannabinoid in industrial hemp is non-psychogenic cannabidiol (CBD) with a proportion of 1 to 5%.
The variety of appearances for cannabis. Only
C. sativa (left) is suited for industrial hemp, but it also has medicinal varieties.
There are broadly three groups of Cannabis varieties being cultivated today:
- Varieties primarily cultivated for their fiber, characterized by long stems and little branching, extreme red, yellow, blue or purple coloration, or thickness of stem and solid core, such as hemp Cannabis oglalas, and more generally called industrial hemp.
- Varieties grown for hemp seed oil which is high in protein and essential fatty acids and has no psychoactive properties.
- Varieties grown for medicinal, spiritual or recreational purposes.
A nominal, if not legal distinction is often made between hemp, with concentrations of the psychoactive chemical THC far too low to be useful as a drug, and Cannabis used for medical, recreational, or spiritual purposes.
Hemp plants can be vulnerable to various pathogens, including bacteria, fungi, nematodes, viruses and other miscellaneous pathogens. Such diseases often lead to reduced fiber quality, stunted growth, and death of the plant. These diseases rarely affect the yield of a hemp field, so hemp production is not traditionally dependent on the use of pesticides.
Má, the Mandarin word for hemp. In Taiwan, the use of hemp has been shown to go back at least 10,000 years.
[68]
Hemp use archaeologically dates back to the Neolithic Age in China, with hemp fiber imprints found on Yangshao culture pottery dating from the 5th century BC.[68][69] The Chinese later used hemp to make clothes, shoes, ropes, and an early form of paper.[68]
The classical Greek historian Herodotus (ca. 480 BC) reported that the inhabitants of Scythia would often inhale the vapors of hemp-seed smoke, both as ritual and for their own pleasurable recreation.[70]
Textile expert Elizabeth Wayland Barber summarizes the historical evidence that Cannabis sativa, "grew and was known in the Neolithic period all across the northern latitudes, from Europe (Germany, Switzerland, Austria, Romania, the Ukraine) to East Asia (Tibet and China)," but, "textile use of Cannabis sativa does not surface for certain in the West until relatively late, namely the Iron Age."[71] "I strongly suspect, however, that what catapulted hemp to sudden fame and fortune as a cultigen and caused it to spread rapidly westwards in the first millennium B.C. was the spread of the habit of pot-smoking from somewhere in south-central Asia, where the drug-bearing variety of the plant originally occurred. The linguistic evidence strongly supports this theory, both as to time and direction of spread and as to cause."[72]
Jews living in Palestine in the 2nd century were familiar with the cultivation of hemp, as witnessed by a reference to it in the Mishna (Kil'ayim 2:5) as a variety of plant, along with Arum, that sometimes takes as many as three years to grow from a seedling.
In late medieval Germany and Italy, hemp was employed in cooked dishes, as filling in pies and tortes, or boiled in a soup.[73]
Hemp in later Europe was mainly cultivated for its fibers, and was used for ropes on many ships, including those of Christopher Columbus. The use of hemp as a cloth was centered largely in the countryside, with higher quality textiles being available in the towns.
The Spaniards brought hemp to the Western Hemisphere and cultivated it in Chile starting about 1545.[74] However, in May 1607, "hempe" was among the crops Gabriel Archer observed being cultivated by the natives at the main Powhatan village, where Richmond, Virginia is now situated;[75] and in 1613, Samuell Argall reported wild hemp "better than that in England" growing along the shores of the upper Potomac. As early as 1619, the first Virginia House of Burgesses passed an Act requiring all planters in Virginia to sow "both English and Indian" hemp on their plantations.[76] The Puritans are first known to have cultivated hemp in New England in 1645.[74]
United States "Marihuana" production permit. In the United States, hemp cultivation is
legally prohibited, but during
World War II farmers were encouraged to grow hemp for cordage, to replace
Manila hemp previously obtained from
Japanese-controlled areas. The U.S. government produced a film explaining the uses of hemp, called
Hemp for Victory.
In 1937, the Marihuana Tax Act of 1937 was passed in the United States. It levied a tax on anyone who dealt commercially in cannabis, hemp, or marijuana. It was repealed by an overriding law in 1970.
Hemp was used extensively by the United States during World War II. Uniforms, canvas, and rope were among the main textiles created from the hemp plant at this time.[77] Much of the hemp used was cultivated in Kentucky and the Midwest.
Historically, hemp production had made up a significant portion of antebellum Kentucky's economy. Before the American Civil War, many slaves worked on plantations producing hemp.[78]
During World War II, the U.S. produced a short 1942 film, Hemp for Victory, promoting hemp as a necessary crop to win the war.
By the early twentieth century, the advent of the steam engine and the Diesel engine ended the reign of the sailing ship. The production of iron and steel for cable and ships' hulls further eliminated natural fibres in marine use. Hemp had long since fallen out of favour in the sailing industry in preference to Manila hemp.
The world-leading producer of hemp is China, with smaller production in Europe, Chile and North Korea. Over thirty countries produce industrial hemp, including Australia, Austria, Canada, Chile, China, Denmark, Egypt, Finland, France, Germany, Great Britain, Hungary, India, Italy, Japan, Korea, Netherlands, New Zealand, Poland, Portugal, Romania, Russia, Slovenia, Spain, Sweden, Switzerland, Thailand, Turkey and Ukraine.[79][80]
The United Kingdom, and Germany all resumed commercial production in the 1990s. British production is mostly used as bedding for horses; other uses are under development. Companies in Canada, the UK, the United States and Germany, among many others, process hemp seed into a growing range of food products and cosmetics; many traditional growing countries still continue to produce textile-grade fibre.
In the Australian states of Victoria, Queensland and, most recently, New South Wales the state governments have issued licences to grow hemp for industrial use. The state of Victoria was an early adopter in 1998, and has reissued the regulation in 2008.[81] Queensland has allowed industrial production under licence since 2002,[82] where the issuance is controlled under the Drugs Misuse Act 1986.[83] Most recently, New South Wales now issues licences[84] under a law, the Hemp Industry Regulations Act 2008 (No 58), that came into effect as of 6 November 2008.[85]
Commercial production (including cultivation) of industrial hemp has been permitted in Canada since 1998 under licenses and authorization issued by Health Canada (9,725 ha in 2004, 5450 ha in 2009).[86][87]
Industrial hemp production in
France
France is Europe's biggest producer with 8,000 hectares cultivated. 70-80 % of the hemp fibre produced in Europe in 2003 was used for specialty pulp for cigarette papers and technical applications. About 15% is used in the automotive sector and 5-6% were used for insulation mats. Approximately 95% of hurds were used as animal bedding, while almost 5% were used in the building sector.[9] In 2010/2011 was the total area cultivated with hemp in the EU about 11 000 ha, a decline compared with previous year.[88][64]
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Hemp seed warehouse (Russia)
A hemp crop in Peasenhall Road, Walpole, UK
Licences for hemp cultivation are issued in the European Union, Canada, in all states of Australia and ten states in the United States.[89] In the United Kingdom, these licences are issued by the Home Office under the Misuse of Drugs Act 1971. When grown for non-drug purposes, hemp is referred to as industrial hemp, and a common product is fibre for use in a wide variety of products, as well as the seed for nutritional aspects and for the oil. Feral hemp or ditch weed is usually a naturalized fibre or oilseed strain of Cannabis that has escaped from cultivation and is self-seeding.
Vermont and North Dakota have passed laws enabling hemp licensure. Both states are waiting for permission to grow hemp from the DEA. Currently,[when?] North Dakota representatives are pursuing legal measures to force DEA approval.[90] Oregon has licensed industrial hemp as of August 2009[update].[91] Hemp is not legal to grow in the U.S. under Federal law because of its relation to marijuana, and any imported hemp products must meet a zero tolerance level. It is considered a controlled substance under the Controlled Substances Act (P.L. 91-513; 21 U.S.C. 801 et seq.). Some states have defied Federal law and made the cultivation of industrial hemp legal. These states — North Dakota, Hawaii, Kentucky, Maine, Maryland, Oregon, California, Montana, West Virginia and Vermont — have not yet begun to grow hemp because of resistance from the federal Drug Enforcement Administration.[92]
Uruguay has also approved a project of hemp production as of the second half of 2010.
- ^ "Facts About Hemp". Ecofibre Industries. http://www.ecofibre.com.au/facts.html.
- ^ a b c Van Roekel, Gerjan J. (1994). "Hemp Pulp and Paper Production". Journal of the International Hemp Association (Wageningen, The Netherlands). http://www.druglibrary.org/olsen/hemp/IHA/iha01105.html.
- ^ Atkinson, Gail (2011). "Industrial Hemp Production in Alberta". CA: Government of Alberta, Agriculture and Rural Development. http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/econ9631.
- ^ a b "Special Report". CNBC. http://www.cnbc.com/id/30685661/.
- ^ Lan, Melody (2009-01-17). "Edible, Affordable Indulgences for 2009". The Wall Street Journal. http://online.wsj.com/article/SB123069062782044697.html.
- ^ "The yield of hemp fibre varies from 400 to 2,500 pounds per acre, averaging 1,000 pounds under favorable conditions." Dewey & Merrrill, Hemp Hurds As Papermaking Material, USDA Bulletin No.404, 1916, p. 3.
- ^ Struik, P.C.; Amaducci, S.; Bullard, M.J.; Stutterheim, N.C.; Venturi, G.; Cromack, H.T.H. (2000). "Agronomy of fibre hemp (Cannabis sativa L.) in Europe". Industrial Crops and Products 11 (2–3): 107. DOI:10.1016/S0926-6690(99)00048-5.
- ^ a b c d "Growing Industrial Hemp in Ontario, Ministry of Agriculture, Food and Rural Affairs, Canada, 2008". ON, CA: Omafra. http://www.omafra.gov.on.ca/english/crops/facts/00-067.htm#fertility. Retrieved 2011-04-20.
- ^ a b c d Karus, Michael (2004). European Hemp Industry 2002 Cultivation, Processing and Product Lines. . Journal of Industrial Hemp (London: Taylor & Francis, Informaworld) 9 (2). http://www.informaworld.com/smpp/content~db=all~content=a902981619~frm=titlelink. Retrieved 2011-04-20
- ^ "FAQs & Facts: Facts". Resources: Education. The HIA. http://www.thehia.org/facts.html. Retrieved 2008-07-05.
- ^ "HIA: Resources: Education: FAQs & Facts: FAQs: Answers". www.thehia.org. http://www.thehia.org/faq7.html. Retrieved 2008-07-05.
- ^ "D. Risula, and others, Saskatchewan Ministry of Agriculture, October 2009". http://www.agriculture.gov.sk.ca/Default.aspx?DN=e60e706d-c852-4206-9959-e4b134782175. Retrieved 2011-04-20.
- ^ :) "Information paper on industrial hemp (industrial cannabis)". www2.dpi.qld.gov.au. Archived from the original on 2008-07-23. http://web.archive.org/web/20080723143556/http://www2.dpi.qld.gov.au/hemp/16241.html. Retrieved 2008-07-05.
- ^ Datwyler SL, Weiblen GD. Genetic Variation in Hemp and marijuana (Cannabis sativa L.) sativa plants are taller and less dense. Indica plants are shorter but a lot more dense than sativas. According to Amplified Fragment Length Polymorphisms. Journal of Forensic Sciences. 2006; 51(2):371-375. doi:10.1111/j.1556-4029.2006.00061.x
- ^ a b Hemp and Marijuana: Myths & Realities written by David P. West, Ph.D. for the North American Industrial Hemp Council
- ^ a b Graeme Thomas. "Natural Fibers: Hemp Food and Agriculture Organization of the United Nations, 2009". Naturalfibres2009.org. http://www.naturalfibres2009.org/en/fibres/hemp.html. Retrieved 2011-04-20.
- ^ "Erowid Cannabis Vault : Culture #2". www.erowid.org. http://www.erowid.org/plants/cannabis/cannabis_culture2.shtml. Retrieved 2008-06-20.
- ^ "Vote Industrial Hemp". http://www.voteindustrialhemp.com/. http://www.voteindustrialhemp.com/. Retrieved 2007-01-23.
- ^ "America's First Hemp Drink - Chronic Ice - Making a Splash in the Natural Beverage Market". San Francisco Chronicle. Vocus (Los Angeles). 8 June 2011. http://www.sfgate.com/cgi-bin/article.cgi?f=/g/a/2011/06/08/prweb8548278.DTL. Retrieved 19 June 2011. "Chronic Ice, the nation's first drink containing hemp, is making a splash in the healthy beverage market."
- ^ "Living Harvest - The Official Website & Online Store - Hemp Seed Nutrition - Unearthing the Benefits of Hemp Seed". www.worldpantry.com. http://www.worldpantry.com/cgi-bin/ncommerce/ExecMacro/livingharvest/home.d2w/report. Retrieved 2008-07-27.
- ^ http://www.ers.usda.gov/publications/ages001E/ages001Eh.pdf
- ^ "Wilde Country Rancho Hemp Products". Wcranchohemp.com. http://www.wcranchohemp.com/info.php. Retrieved 2011-11-30.
- ^ Callaway JC (2004). Hempseed as a nutritional resource: an overview. Euphytica 140:65-72.
- ^ "Hemp seed oil as an anti-inflammatory". Schmoo.co.uk. http://www.schmoo.co.uk/thclub/hemp.htm. Retrieved 2011-04-20.
- ^ "CRRH, Archaeologists agree that cannabis was among the first crops cultivated by human beings at least over 6,000 years ago, and perhaps more than 12,000 years ago". Crrh.org. http://www.crrh.org/cannabis. Retrieved 2011-04-20.
- ^ "Online Etymology Dictionary". Etymonline.com. http://www.etymonline.com/index.php?term=canvas. Retrieved 2011-04-20.
- ^ NNFCC. "NNFCC Project Factsheet: Guide to Building with Hemp-Lime Composites, NNFCC 07-001", "National Non-Food Crops Centre", Retrieved on 16 Feb 2011
- ^ Isabelle, Ceyte (2008) (in French). Etat,acteurs privés et innovation dans le domaine des matériaux de construction écologiques : Le développement du béton de chanvre depuis 1986 (MASTER - Politiques publiques et gouvernements comparés thesis). 'Institut d'Etudes Politiques de Lyon. http://doc.sciencespo-lyon.fr/Ressources/Documents/Etudiants/Memoires/Cyberdocs/Masters/PPGC/ceyte_i/memoire.pdf.
- ^ "The NNFCC Renewable House". Renewable-house.co.uk. http://www.renewable-house.co.uk/. Retrieved 2011-04-20.
- ^ USA Today. 2010-09-12. http://content.usatoday.com/communities/greenhouse/post/2010/09/hemp-houses-built-asheville/1.
- ^ Thermoformable Composite Panels. Composites World. 2006. http://www.flexformtech.com/pdf/2006/Composites%20World%20%20%27%20Thermoformable%20Composite%20Panels%27.pdf.
- ^ Plastics (www.hemp.com)
- ^ Lotus announces hemp-based Eco Elise: a new type of ‘green’ car (www.transport20.com)
- ^ "Cai Lun Improved the Papermaking Technology". chinaculture.org. http://www.chinaculture.org/gb/en_madeinchina/2005-06/28/content_70172.htm.
- ^ A brief history of the St. Petersburg Paper Mill of Goznak (www.goznak.spb.ru)
- ^ Dewey and Merrill, U.S.D.A. Bulletin No. 404, Hemp Hurds as Paper-Making Material, Washington, D.C., October 14, 1916. Page 25
- ^ "The Project Gutenberg eBook of Hemp Hurds as Paper-Making Material, by Lyster H. Dewey and Jason L. Merrill". Gutenberg.org. http://www.gutenberg.org/files/17855/17855-h/17855-h.htm. Retrieved 2011-04-20.
- ^ "Hayo M.G. van der Werf : Hemp facts and hemp fiction". Hempfood.com. http://www.hempfood.com/iha/iha01213.html. Retrieved 2011-04-20.
- ^ "David P. West: Fiber Wars: The Extinction of Kentucky Hemp". Gametec.com. http://www.gametec.com/hemp/fiberwars/index.html. Retrieved 2011-04-20.
- ^ "Additional Statement of H.J. Anslinger, Commissioner of Narcotics". http://www.druglibrary.org/SCHAFFER/hemp/taxact/t10a.htm. Retrieved 2006-03-25.
- ^ "Valerie L. Vantreese:INDUSTRIAL HEMP:GLOBAL OPERATIONS, LOCAL IMPLICATIONS, Department of Agricultural Economics University of Kentucky, 1998" (PDF). http://www.uky.edu/Classes/GEN/101/Hemp/HEMP98.PDF. Retrieved 2011-04-20.
- ^ a b "Michael Karus:European hemp industry 2001 till 2004: Cultivation, raw materials, products and trends, 2005" (PDF). http://www.eiha.org/attach/10/05-02_EU-EIHA_e.pdf. Retrieved 2011-04-20.
- ^ a b "Steam energy:Hemp Pulp & Paper Production, January 1st 1994". Hempline.com. http://www.hempline.com/hemp/hemp_articles/4/. Retrieved 2011-04-20.
- ^ Anatomy of a Modern Paper Mill, Faculty of Natural Resources Management, Lakehead University
- ^ Boise: Nonwood Alternatives to Wood Fiber in Paper
- ^ "Green bedrooms and more: Healthy fabrics for the home". The Ottawa Citizen. 2008-04-10. http://www.canada.com/ottawacitizen/news/story.html?id=9d131f00-80d5-4034-b196-cb7ca6ef4c74.
- ^ Cronin, Mary Elizabeth (1995-02-11). "Hemp fashions are clean, comfy, and legal". The Free Lance-Star. http://news.google.com/newspapers?id=AucyAAAAIBAJ&sjid=vgcGAAAAIBAJ&pg=6809,2114672&dq=hemp+cloth&hl=en.
- ^ Schubert, Pit. "Our ropes are much stronger than we believe". Union Internationale Des Associations D'Alpinisme. Archived from the original on September 27, 2009. http://web.archive.org/web/20070927193022/http://www.uiaa.ch/article.aspx?c=231&a=147.
- ^ NNFCC. "Crop Factsheet: Hemp", National Non-Food Crops Centre, 2008-06-09. Retrieved on 2009-05-06
- ^ "Phytoremediation: Using Plants to Clean Soil". Mhhe.com. http://www.mhhe.com/biosci/pae/botany/botany_map/articles/article_10.html. Retrieved 2011-04-20.
- ^ "Hemp As Weed Control". www.gametec.com. http://www.gametec.com/hemp/WEED.CTRL.htm. Retrieved 2008-07-09.
- ^ "COOLFUEL Episode: Sugarcane and Hempoline". http://planetgreen.discovery.com/tv/cool-fuel/episode-sugarcane-hempoline.html. Retrieved 2009-10-16.
- ^ "Clean Energy Solutions". Hemp 4 Fuel. http://www.hemp4fuel.com/. Retrieved 2011-04-20.
- ^ "Pollution: Petrol vs. Hemp". Hempcar.org. http://www.hempcar.org/petvshemp.shtml. Retrieved 2011-04-20.
- ^ "Biofuels Facts". Hempcar.org. http://www.hempcar.org/biofacts.shtml. Retrieved 2011-04-20.
- ^ Increased biogas production at the Henriksdals Waste Water plant, Cajsa Hellstedt et. all, June 2010
- ^ Hemp Cultivation (www.green.net.au)
- ^ New Fossil Evidence for the Past Cultivation and Processing of Hemp (Cannabis sativa L.) in Eastern England Author(s): R. H. W. Bradshaw, P. Coxon, J. R. A. Greig, A. R. Hall Source: New Phytologist, Vol. 89, No. 3 (Nov., 1981), pp. 503-510 Published by: Blackwell Publishing on behalf of the New Phytologist Trust Accessed: 06/07/2009
- ^ "Dr. Ivan BÛcsa, GATE Agricultural Research Institute, Kompolt - Hungary, Book Review Re-discovery of the Crop Plant Cannabis Marihuana Hemp (Die Wiederentdeckung der Nutzplanze Cannabis Marihuana Hanf)". Hempfood.com. http://www.hempfood.com/iha/iha01214.html. Retrieved 2011-04-20.
- ^ "Hemp research and growing in Ukraine". Aginukraine.com. 2002-01-06. http://www.aginukraine.com/bast/bast01.htm. Retrieved 2011-04-20.
- ^ Hemp will help Ukraine to grow wealthy (Russian)
- ^ Interview with Dr. V. G. Virovets, the head of the Hemp Breeding Department at the Institute of Bast Crops (1998) (English)
- ^ Yuka Hayashi (2009-03-04). "In Drug-Leery Japan, Arrests for Marijuana Are on the Rise". Wall Street Journal. http://online.wsj.com/article/SB123612257155123461.html.
- ^ a b Agriculture in the European Union, Statistical and Economic Information 2011, European Union Directorate-General for Agriculture and Rural Development, page 283
- ^ "Hayo M.G. van der Werf: Hemp facts and hemp fiction; Dr. Ivan BÛcsa: Book Review of book by Jack Herer, Re-discovery of the Crop Plant Cannabis Marihuana Hemp, GATE Agricultural Research Institute, Kompolt - Hungary". Hempfood.com. http://www.hempfood.com/iha/iha01213.html. Retrieved 2011-04-20.
- ^ [1] List of Hemp Varieties (www.ble.de)
- ^ Frank Waskow, Katalyse-Institut für Angewandte Umweltforschung (ed.): Hanf & Co.: die Renaissance der heimischen Faserpflanzen. Verlag Die Werkstatt, Göttingen 1995, ISBN 3-89533-138-4, p. 45 (as at: 2008-04-29).
- ^ a b c Stafford, Peter (1992). Psychedelics Encyclopedia. Berkeley, CA, USA: Ronin Publishing. ISBN 0-914171-51-8. http://books.google.com/?id=Ec5hNgYWHtkC&printsec=frontcover.
- ^ Barber, E. J. W. (1992). Prehistoric Textiles: The Development of Cloth in the Neolithic and Bronze Ages with Special Reference to the Aegean. Princeton University Press. p. 17.
- ^ Herodotus. Histories. IV. 73–75.
- ^ Barber, E. J. W. (1992). Prehistoric Textiles: The Development of Cloth in the Neolithic and Bronze Ages with Special Reference to the Aegean. Princeton University Press. p. 18.
- ^ Barber (1992). p. 19.
- ^ Regional Cuisines of Medieval Europe: A Book of Essays (2002), edited by Melitta Weiss Adamson ISBN 0-415-92994-6 pg. 98, 166
- ^ a b "Feasibility of Industrial Hemp Production in the United States Pacific Northwest, SB681". extension.oregonstate.edu. http://extension.oregonstate.edu/catalog/html/sb/sb681/. Retrieved 2008-06-18.
- ^ Gabriel Archer, A Relatyon of the Discoverie of Our River..., printed in Archaeologia Americana 1860, p. 44. William Strachey (1612) records a native (Powhatan) name for hemp (weihkippeis).
- ^ Proceedings of the Virginia Assembly, 1619, cf. the 1633 Act: Hening's Statutes at Large, p. 218
- ^ Plant Wizards Fight Wartime Drug Peril. 1943. pp. 62–63.
- ^ James F. Hopkins, "Slavery in the Hemp Industry", Drug Library
- ^ "Hemp vs. Marijuana". azhemp.org. http://azhemp.org/Archive/Package/Legal/legal.html. Retrieved 2008-06-18.
- ^ Hemp Facts (www.thehia.org)
- ^ "Drugs, Poisons and Controlled Substances (Industrial Hemp) Regulations 2008" (PDF). www.dms.dpc.vic.gov.au. http://www.dms.dpc.vic.gov.au/Domino/Web_Notes/LDMS/PubLawToday.nsf/b12e276826f7c27fca256de50022686b/69FF479D20FC0F06CA2574EC0012EDDF/$FILE/08-98sr001.pdf. Retrieved 2008-11-24.
- ^ "Guidelines for engaging in the commercial production of industrial hemp in Queensland". dpi.qld.gov.au. http://www2.dpi.qld.gov.au/hemp/16239.html. Retrieved 2008-11-24. [dead link]
- ^ "Drugs Misuse Act 1986" (PDF). www.legislation.qld.gov.au. http://www.legislation.qld.gov.au/LEGISLTN/CURRENT/D/DrugsMisuseA86.pdf. Retrieved 2008-11-24.
- ^ "Opportunities to engage in commercial low THC hemp fibre and seed production in NSW". www.dpi.nsw.gov.au. http://www.dpi.nsw.gov.au/agriculture/field/field-crops/fibres/hemp/commercial-production. Retrieved 2008-11-24.
- ^ "Hemp Industry Regulation 2008". legislation.nsw.gov.a. http://www.legislation.nsw.gov.au/viewtop/inforce/subordleg+475+2008+FIRST+0+N/. Retrieved 2008-11-24.
- ^ [2][dead link]
- ^ "Government of Alberta: Industrial Hemp Production in Canada, February 2, 2010". .agric.gov.ab.ca. http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/econ9631. Retrieved 2011-04-20.
- ^ Jordbruksverket: 2.1–2.3, 2.5 Marknadssituationen för spannmål, oljeväxter, proteingrödor, ris,2011-03-10,(Swedish Board of Agriculture, Report from an expert group in the European Union about the market situation for a number of agricultural products. Published only in Swedish)
- ^ "Oregon Passes Hemp Bill". http://news.findlaw.com/prnewswire/20090629/29jun20091931.html. Retrieved 2009-07-20. [dead link]
- ^ "North Dakota Case". Votehemp.com. http://www.votehemp.com/legal_cases_ND.html. Retrieved 2011-04-20.
- ^ "75th Oregon Legislative Assembly — 2009 Regular Session Senate Bill 676". Leg.state.or.us. http://www.leg.state.or.us/09reg/measures/sb0600.dir/sb0676.b.html. Retrieved 2011-04-20.
- ^ "Hemp, hemp, hooray: Bill aims to aid farmers with new but controversial crop". Minnesotaindependent.com. http://minnesotaindependent.com/27887/hemp-hemp-hooray-bill-aims-to-aid-farmers-with-new-but-controversial-crop. Retrieved 2011-04-20.
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![Hemp Gru - Braterstwo ft. Załoga [VIDEO] (DIIL.TV HD)](http://web.archive.org./web/20130126072108im_/http://i.ytimg.com/vi/6TDsTwlb7Xc/default.jpg "Hemp Gru - Braterstwo ft. Załoga [VIDEO] (DIIL.TV HD)")
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