By Dinesh Arora
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Extra resources for Biotech's Dictionary of Horticulture
Biological diversity presence of many different types of living organisms. biological pest control using living organisms such as beneficial insects or parasites to destroy garden pests. biocontrol see biological control. biomagnification increase in the concentration of a chemical substance as it progresses to higher trophic levels of a food chain. biodegradable substance capable of being decomposed by biological processes. biomass the weight of living organisms (plants and animals) in an ecosystem, at a given Horticulture bioremediation bipolaris 36 point in time, expressed as fresh or dry weight.
Chemolithotroph organism that obtains energy from the oxidation of inorganic compounds and uses inorganic compounds as electron donors. chemoorganotroph organism that obtains energy and electrons (reducing power) from the oxidation of organic compounds. chemostat continuous culture device usually controlled by the concentration of limiting nutrient and dilution rate. chemotaxis oriented movement of a motile organism with reference to a chemical Horticulture chemotherapy chlorosis 53 agent. May be positive (toward) or negative (away) with respect to the chemical gradient.
It requires frequent cutting with a reel mower, frequent fertilisation and watering. It is highly susceptible to several diseases. berm a landscaping technique that is used to create interest, privacy, or screening. It may also divert water runoff. Horticulture bicollateral vascular bundle bioaccumulation 34 Creating a mound of earth or a hill makes it. bicollateral vascular bundle a vascular bundle with phloem on both sides of the xylem instead of on the outer side only. bifurcate dividing into two branches.