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Outdoor marijuana strains, like most other strains, can be bought in numerous locations and over a hundred different cannabis strains that are bred for outdoor growing exist—many of these outdoor cannabis seeds are simply copies of other pre-existent strains or seeds with different names and descriptions. [28]
Feral cannabis is an exceptionally hardy weed, widely dispersing its seeds which can lie dormant for 7–10 years before sprouting again. [4] In Minnesota, hemp is classified among the 11 "noxious prohibited weeds" along with several species of thistle, and noted for damaging farmers' plowing equipment.
In refuges, non-resistant strains outcompete resistant ones. [ 214 ] With sufficiently high levels of transgene expression, nearly all of the heterozygotes (S/s), i.e., the largest segment of the pest population carrying a resistance allele, will be killed before maturation, thus preventing transmission of the resistance gene to their progeny ...
Widespread seed dispersal occurs when its spiny burs fall off the plant and are carried to new habitat by people, animals, machinery, or flowing water. The plant is destructive to native and crop plants because it easily outcompetes them for light. [5] Herbicide resistant giant ragweed populations were first identified in the late 1990s. [10]
Gaultheria shallon is 0.4 to 3.05 metres (1 + 1 ⁄ 2 to 10 feet) tall, sprawling to erect. It is loosely to densely branched and often forms dense, nearly impenetrable thickets. [2] The twigs are reddish-brown, with shredding bark. Twigs can live up to 16 years or more, but bear leaves only the first few years. [2]
The seeds of Abrus precatorius are very consistent in weight, even under different moisture conditions due to the water-impermeable seed-coat. [19] Formerly Indians used these seeds to weigh gold using a measure called a Ratti, where 8 Ratti = 1 Masha; 12 Masha = 1 Tola (11.6 Grams). [20]
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The seeds are small, 4–7 mm (3 ⁄ 16 – 1 ⁄ 4 in) long, and have a long slender wing 15–22 mm (9 ⁄ 16 – 7 ⁄ 8 in) long. The branches are borne in regular whorls , [ 5 ] produced at the rate of one a year; this is pronounced in narrow, stand-grown trees, while open specimens may have a more rounded form with wide-reaching limbs.