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Often, the distance between lamp and plant is in the range of 0.6 m (2 ft) with high pressure sodium lamps, to 10 cm (4 in) with other lamps, such as compact, large and high-output fluorescent lamps. With proper cooling any light type can be moved extremely close to plants to combat the inverse square law, but there are reasons to keep some ...
Autoflowering cannabis or day neutral cannabis varieties automatically switch from vegetative growth to the flowering stage based on age, as opposed to the ratio of light to dark hours required with photoperiod dependent/short-day strains. Many autoflowering varieties are ready to harvest in less than 10 weeks from seed.
Climacteric fruit can be either monocots or dicots and the ripening of these fruits can still be achieved even if the fruit has been harvested at the end of their growth period (prior to ripening on the parent plant). [2] Non-climacteric fruits ripen without ethylene and respiration bursts, the ripening process is slower, and for the most part ...
[2] Indoor cultivation of cannabis is common and research intensive. [3] A 2012 study estimated that 1% of energy production in the United States is for cannabis production, giving cannabis a substantial carbon footprint. [3] That same study could not identify energy analysts or policymakers who had addressed the issue. [3]
A growing number of states support the legalization of marijuana. Currently, recreational cannabis use is legal in 24 states , while medical use is legal in 38 states.
The Cannabis plant has a history of medicinal use dating back thousands of years across many cultures. [126] The Yanghai Tombs, a vast ancient cemetery (54 000 m 2) situated in the Turfan district of the Xinjiang Uyghur Autonomous Region in northwest China, have revealed the 2700-year-old grave of a shaman.
After vernalization, plants have acquired the ability to flower, but they may require additional seasonal cues or weeks of growth before they will actually do so. The term is sometimes used to refer to the need of herbal (non-woody) plants for a period of cold dormancy in order to produce new shoots and leaves, [ 1 ] but this usage is discouraged.
Ethylene sensors can be used to precisely control the amount of gas. Covered fruit ripening bowls or bags are commercially available. These containers increase the amount of ethylene and carbon dioxide gases around the fruit, which promotes ripening. [6] Climacteric fruits continue ripening after being picked, a process accelerated by ethylene ...