Hemp, (Cannabis sativa), also known as industrial hemp, plant for the family Cannabaceae cultivated for the fibre (bast fiber) or its edible seeds. Hemp can be confused with the cannabis plants that act as resources of the medication marijuana as well as the medication preparation hashish. A compound that produces psychoactive effects in humans, the variety of cannabis cultivated for hemp has only small amounts of THC relative to that grown for the production of marijuana or hashish although all three products—hemp, marijuana, and hashish—contain tetrahydrocannabinol ( THC.
The hemp plant is really a stout, aromatic, erect herb that is annual. The slender canelike stalks are hollow except during the tip and base. The leaves are compound with palmate form, additionally the plants are small and greenish yellow. Seed-producing flowers form elongate, spikelike clusters growing regarding the pistillate, or feminine, plants. Pollen-producing plants form many-branched clusters on staminate, or male, plants.
Cultivation and processing
Hemp originated from Central Asia. Hemp cultivation for fiber ended up being recorded in China as soon as 2800 bce and was practiced into the Mediterranean nations of European countries early in the Christian age, distributing for the sleep of European countries throughout the dark ages. It had been planted in Chile within the 1500s and a hundred years later in the united states.
Hemp is grown in temperate zones as a yearly cultivated from seed and will achieve a height as high as 5 metres (16 foot). Crops grow best in sandy loam with good drainage and need normal month-to-month rain with a minimum of 65 mm (2.5 inches) through the entire growing season.
Crops cultivated for fibre are densely sowed and plants that are produce 2–3 metres (6–10 legs) high with very little branching. Plants grown for oilseed are planted further apart and they are faster and many-branched. In fibre manufacturing, maximum yield and quality are acquired by harvesting right after the flowers reach maturity, indicated by the entire blossoms and easily losing pollen associated with the male plants. Although sometimes pulled up by hand, flowers are more often take off about https://cbdoilrank.net 2.5 cm (1 inches) over the ground.
Fibres are acquired by subjecting the stalks to a string of operations—including retting, drying, and crushing—and a shaking process that completes separation through the woody part, releasing the long, fairly right fiber, or line. The fibre strands, frequently over 1.8 metres (5.8 feet) long, are made of specific cylindrical cells having a surface that is irregular.
Products and uses
The fiber, longer much less flexible than flax, is normally yellowish, greenish, or a darkish or grey and, since it is perhaps perhaps not effortlessly bleached to adequately light colors, is hardly ever colored. It’s strong and sturdy and it is employed for cordage—e.g., twine, yarn, rope, cable, and string—and for synthetic sponges and such coarse fabrics as sacking burlap that is( and canvas. In Italy some hemp receives processing that is special creating whitish color and appealing lustre, and it is utilized to produce material much like linen. Hemp fiber can also be utilized to create bioplastics which can be recyclable and biodegradable, with respect to the formula.
The edible seeds have about 30 % oil and therefore are a way to obtain protein, fibre, and magnesium. Shelled hemp seeds, often called hemp hearts, can be bought as wellness meals and may also be consumed natural; these are typically commonly sprinkled on salads or blended with good fresh fruit smoothies. Hemp seed milk is employed instead of dairy milk in products and meals. The oil obtained from hemp seed could be used to make paints, varnishes, soaps, and edible oil by having a low smoke point. Historically, the seed’s chief use that is commercial been for caged-bird feed.
A quantity of other plant fibres are called “hemp. although just the hemp plant yields real hemp” included in these are Indian hemp (Apocynum cannabinum), Mauritius hemp (Furcraea foetida), and hemp that is sunnCrotalaria juncea).
The Editors of Encyclopaedia Britannica this short article had been lately revised and updated by Melissa Petruzzello, Assistant Editor.