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Watering frequency and amount is determined by many factors, including temperature and light, the age, size and stage of growth [22] of the plant and the medium's ability to retain water. A conspicuous sign of water problems is the wilting of leaves. [23] Giving too much water can kill cannabis plants if the growing medium gets over-saturated.
Cannabis plants can produce volatile organic compound in great enough amounts to increase the criteria air pollutants in indoor and outdoor environments. [6] This could create an occupational health hazard in areas with large numbers of plants. [6] Cannabis in California is a frequent focus of study.
The Duquenois reagent is used in the Rapid Modified Duquenois–Levine test (also known as the simple Rapid Duquenois Test), which is an established screening test for the presence of cannabis. The test was initially developed in the 1930s by the French medical biochemist Pierre Duquénois (1904–1986) and was adopted in the 1950s by the ...
In 2015, the first government standards for testing were proposed in Colorado's legislature, when potency and microbial testing became mandatory in the state. [11] [12] [13] Colorado cannabis testing laboratories, such as AgriScience Labs, are regulated by the Colorado Department of Revenue's Marijuana Enforcement Division and the Colorado Department of Public Health and Environment. [14]
In 2014, Governor Shumlin stated his support for a tax-and-regulate system for cannabis. [6] A Rand Corporation study commissioned by the state in May 2014 and released in January 2015 stated that Vermont could gain $20 million and $75 million a year in tax revenue, but noted too that these sums would be vulnerable to either federal interference, or market competition if a neighboring state ...
it provides a source of calcium for plants; it improves water penetration for acidic soils; it improves the uptake of major plant nutrients (nitrogen, phosphorus, and potassium) of plants growing on acid soils. [2] Other forms of lime have common applications in agriculture and gardening, including dolomitic lime and hydrated lime.
Because the optimal range is different for every plant, gardeners should learn the pH requirements of each one. For example, carnations require a pH range of 6.7-6.9; turfgrasses, 6.3-6.8 ...
Cannabis growing wild in a ditch in Buffalo County, Nebraska. Feral cannabis, or wild marijuana (often referred to in North America as ditch weed), is wild-growing cannabis generally descended from industrial hemp plants previously cultivated for fiber, with low or negligible amounts of psychoactive tetrahydrocannabinol (THC).