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The study most cited in favour of the specificity of the D–L test is Thornton and Nakamura (1972). [5] The authors themselves reported that the D–L test gave false positives, but declared the D–L test confirmatory when combined with the presence of cystolithic hairs, which marijuana plants possess. However, many plant species have such ...
Calcium hydroxide has many names including hydrated lime, caustic lime, builders' lime, slaked lime, cal, and pickling lime. Calcium hydroxide is used in many applications, including food preparation, where it has been identified as E number E526. Limewater, also called milk of lime, is the common name for a saturated solution of calcium hydroxide.
Agricultural lime, also called aglime, agricultural limestone, garden lime or liming, is a soil additive made from pulverized limestone or chalk. The primary active component is calcium carbonate . Additional chemicals vary depending on the mineral source and may include calcium oxide .
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]
Water cloning can take longer to show roots, but is a truly natural way to propagate any plant that is able. Marijuana growers often root clones in peat pellets (compressed peat moss) or in rock wool. Another technique that has become popular for rooting clones is aeroponic cloning. [40] The main steps of hormonal cannabis cutting are as follows:
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To administer the test, a user simply has to mix the chemicals with a particle of the suspected substance; if the chemicals turn purple, this indicates the possibility of marijuana. But the color variations can be subtle, and readings can vary by examiner. It was adopted in the 1950s by the United Nations as the preferred test for cannabis ...
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.