Search results
Results from the WOW.Com Content Network
Pruning is a horticultural, arboricultural, and silvicultural practice involving the selective removal of certain parts of a plant, such as branches, buds, or roots. The practice entails the targeted removal of diseased , damaged, dead, non-productive, structurally unsound, or otherwise unwanted plant material from crop and landscape plants .
Large pruning wounds, such as those left behind in trees after topping, may become entry points for pathogens and may result in extensive decay. Decay undermines, to greater or lesser extent, the long-term health and physical stability of trees; most notably in those species which compartmentalize decay less effectively. Should a tree survive ...
Topping is the removal of the top of the apical meristem (dominant central stem), called the apex or terminal bud, to transfer apical dominance (the tendency for the apex to grow more rapidly than the rest of the plant) to the shoots emanating from the two nodes immediately beneath the pruning cut. This process can be repeated on one or both of ...
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.
Most slang names for marijuana and hashish date to the jazz era, when it was called gauge, jive, reefer. Weed is a commonly used slang term for drug cannabis. New slang names, like trees, came into use early in the twenty-first century. [2] [3] [4]
Cannabis ruderalis is a variety, subspecies, or species of Cannabis native to Central and Eastern Europe and Russia. It contains a relatively low quantity of psychoactive compound tetrahydrocannabinol (THC) and does not require photoperiod to blossom (unlike C. indica and C. sativa ).
Cannabis use is detectable with hair tests and is generally included in the standard hair test. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. [5] If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.
Radiation induces hair loss through damage to hair follicle stem cell progenitors and alteration of keratin expression. [72] [73] Radiation therapy has been associated with increased mucin production in hair follicles. [74] Studies have suggested electromagnetic radiation as a therapeutic growth stimulant in alopecia. [75]