calcium ammonium nitrate
51Salting ski race course — In the sport of alpine ski racing, applying chemicals to the snow surface is done to harden the course, making the race more fair for athletes running later in the race. The most common chemicals used are sodium chloride, calcium chloride, urea,… …
52chemical compound — Introduction any substance composed of identical molecules consisting of atoms (atom) of two or more chemical elements (chemical element). All the matter in the universe is composed of the atoms of more than 100 different chemical elements …
53Acid-alkali reaction — An acid alkali reaction is a special case of an acid base reaction, where the base used is also an alkali. When an acid reacts with an alkali it forms a metal, salt and water. Acid alkali reactions are also a type of neutralisation reaction.In… …
54Ozone — For other uses, see Ozone (disambiguation). Ozone …
55Soil conservation — is set of management strategies for prevention of soil being eroded from the earth’s surface or becoming chemically altered by overuse, salinization, acidification, or other chemical soil contamination. The principal approaches these strategies… …
56Colored fire — is a common pyrotechnic effect used in stage productions, fireworks and by fire performers the world over. Generally, the color of a flame may be red, orange, yellow, or white, and is dominated by blackbody radiation from soot and steam. When… …
57NPK rating — NPK redirects here. For the company that uses the NPK stock symbol, see National Presto Industries. NPK rating (or N P K) is used to label fertilizer based on the relative content of the chemicals nitrogen(N), phosphorus(P), and potassium(K) that …
58fertilizer — /ferr tl uy zeuhr/, n. 1. any substance used to fertilize the soil, esp. a commercial or chemical manure. 2. a person, insect, etc., that fertilizes an animal or plant: Bees are fertilizers of flowers. [1655 65; FERTILIZE + ER1] * * * Natural or… …
59oxide — oxidic /ok sid ik/, adj. /ok suyd, sid/, n. Chem. a compound in which oxygen is bonded to one or more electropositive atoms. Also, oxid /ok sid/. [1780 90; < F (now oxyde), b. oxygène and acide. See OXYGEN, ACID] * * * I Any of a large and… …
60Neodymium — praseodymium ← neodymium → promethium ↑ Nd ↓ U …
