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Alföld

(Encyclopedia) AlföldAlföldôlˈföld [key], Hun. Nagy-Alföld [Great Alföld], great central plain of Hungary extending into Serbia and W Romania. The level region is drained by the Tisza and Danube…

rake

(Encyclopedia) rake, farm implement consisting of a row of straight or curved teeth of metal or wood attached to a bar or frame. It is used for gathering hay or grain into piles; for clearing fields…

Ordos

(Encyclopedia) OrdosOrdosôrˈdōs [key], Mandarin Erdesi, sandy desert plateau region, c.35,000 sq mi (90,650 sq km), Inner Mongolian Autonomous Region, N China; almost encircled by the great northern…

cotyledon

(Encyclopedia) cotyledoncotyledonkŏtˌəlēdˈən [key], in botany, a leaf of the embryo of a seed. The embryos of flowering plants, or angiosperms, usually have either one cotyledon (the monocots) or two…

gramicidin

(Encyclopedia) gramicidingramicidingrămˌĭsīdˈən [key], antibiotic obtained from the bacterial species Bacillus brevis, which is found in soil. Gramicidin is particularly effective against gram-…

agronomy

(Encyclopedia) agronomyagronomyəgrŏnˈəmē [key], branch of agriculture dealing with various physical and biological factors—including soil management, tillage, crop rotation, breeding, weed control,…

Sumbawa

(Encyclopedia) Sumbawa or SoembawaSumbawaboth: s&oomacr;mbäˈwä [key], island (1990 pop. 965,674), 5,964 sq mi (15,447 sq km), Indonesia, one of the Lesser Sundas, between the Flores Sea and the…

Xochimilco

(Encyclopedia) XochimilcoXochimilcosōchēmēlˈkō [key], town (1990 pop. 271,151), Federal District, S central Mexico, suburb of Mexico City. Mainly a commercial and tourist center, it is famous for its…

catchment area

(Encyclopedia) catchment area or drainage basin, area drained by a stream or other body of water. The limits of a given catchment area are the heights of land—often called drainage divides, or…

nitrate

(Encyclopedia) nitrate, chemical compound containing the nitrate (NO3) radical. Nitrates are salts or esters of nitric acid, HNO3, formed by replacing the hydrogen with a metal (e.g., sodium or…