Cannabis first domesticated 12,000 years ago: study
Cannabis was first domesticated around 12,000 years ago in China, researchers found, after analyzing the genomes of plants from across the world.
Cannabis was first domesticated around 12,000 years ago in China, researchers found, after analyzing the genomes of plants from across the world.
Plants & Animals
Jul 17, 2021
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University of Saskatchewan researchers have discovered the chemical pathway that Cannabis sativa uses to create bioactive compounds called cannabinoids, paving the way for the development of marijuana varieties to produce ...
Biochemistry
Jul 16, 2012
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Accurate climate data is immensely important for climate change predictions and modeling. Using a unique climate data set of 170 stations, mainly from the mountains of Tanzania including Kilimanjaro, Dr. Andreas Hemp, researcher ...
Earth Sciences
Mar 15, 2024
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Cannabinoids, naturally occurring compounds found in hemp plants, may have evolved to deter pests from chewing on them, according to experiments that showed higher cannabinoid concentrations in hemp leaves led to proportionately ...
Molecular & Computational biology
Nov 15, 2023
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Scientists from the USDA's Agricultural Research Service (ARS) and North Dakota State University (NDSU) recently found that when cattle were fed with the industrial hemp byproduct, hempseed cake, very low levels of Cannabis ...
Agriculture
Apr 12, 2023
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Commercial hemp is currently experiencing a revival due to its many applications. Commercial hemp varieties contain only small amounts of psychoactive (intoxicating) cannabinoids, which include Δ9-tetrahydrocannabinol (Δ9-THC). ...
Plants & Animals
Nov 15, 2022
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Growing hemp for CBD (cannabidiol) is a burgeoning industry, thanks to the compound's use in treating everything from pain, anxiety and depression to easing cancer-related symptoms.
Plants & Animals
Jul 28, 2021
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A study by Canadian researchers is providing a clearer picture of the evolutionary history and genetic organization of cannabis, a step that could have agricultural, medical and legal implications for this valuable crop.
Plants & Animals
Aug 26, 2015
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Genetic differences between hemp and marijuana determine whether Cannabis plants have the potential for psychoactivity, a new study by University of Minnesota scientists shows.
Biotechnology
Jul 17, 2015
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As hemp makes a comeback in the U.S. after a decades-long ban on its cultivation, scientists are reporting that fibers from the plant can pack as much energy and power as graphene, long-touted as the model material for supercapacitors. ...
Nanomaterials
Aug 12, 2014
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Hemp (from Old English hænep) is mostly used as a name for low tetrahydrocannabinol (THC) strains of the plant Cannabis sativa, of fiber and/or oilseed varieties. In modern times, hemp has been used for industrial purposes including paper, textiles, biodegradable plastics, construction, health food and fuel with modest commercial success. Since 2007, commercial success of hemp food products has grown considerably.
Hemp is one of the faster growing biomasses known, producing up to 25 tonnes of dry matter per hectare per year. A normal 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.
For a crop, hemp is very environmentally friendly as it requires few pesticides, when not grown industrially and no herbicides. Results indicate that high yield of hemp may require high total nutrient levels (field plus fertilizer nutrients) similar to a high yielding wheat crop.
Hemp is one of the earliest domesticated plants known.
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 production of recreational and medicinal drugs. 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. 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 marijuana can contain anywhere from 2% to over 20%.
The world leading producer of hemp is China with smaller production in Europe, Chile and North Korea. 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.
This text uses material from Wikipedia, licensed under CC BY-SA