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mulch

(Encyclopedia) mulch, any material, usually organic, that is spread on the ground to protect the soil and the roots of plants from the effects of soil crusting, erosion, or freezing; it is also used…

Casiquiare

(Encyclopedia) CasiquiareCasiquiarekäsēkyäˈrā [key], river, c.100 mi (160 km) long, S Venezuela. Also called the Canal Casiquiare, it is a branch of the Orinoco and flows SW to the Río Negro, thus…

Monadnock

(Encyclopedia) MonadnockMonadnockmənădˈnŏk [key], isolated peak, 3,165 ft (965 m) high, SW N.H. It is a popular hiking destination, noted for its view. The peak lends its name to the geomorphic term…

Black Belt

(Encyclopedia) Black Belt, term applied to several areas of Mississippi and Alabama, the heart of the Old South, which are characterized by black soil and excellent cotton-growing conditions. The…

Bennett, Hugh Hammond

(Encyclopedia) Bennett, Hugh Hammond, 1881–1960, American soil scientist, b. near Wadesboro, N.C. Known as the father of soil conservation, he first proposed the theory of sheet erosion of soils in…

cuesta

(Encyclopedia) cuestacuestakwĕsˈtə [key], asymmetric ridge characterized by a short, steep escarpment on one side, and a long, gentle slope on the other. The steep side exposes the edge of erosion-…

levee

(Encyclopedia) leveeleveelĕvˈē [key] [Fr.,=raised], embankment built along a river to prevent flooding by high water. Levees are the oldest and the most extensively used method of flood control. They…

escarpment

(Encyclopedia) escarpment or scarp, long cliff, bluff, or steep slope, caused usually by geologic faulting (see fault) or by erosion of tilted rock layers. An example of a fault scarp is the north…

Moscow, city, United States

(Encyclopedia) MoscowMoscowmŏsˈkō [key], city (1990 pop. 18,519), seat of Latah co., NW Idaho, at the Wash. line; inc. 1887. It is a trade center for a lumber and farm area where wheat, peas, lentils…

Dolomites

(Encyclopedia) Dolomites or Dolomite Alps, Alpine group, N Italy, between the Isarco and Piave rivers, named for the dolomitic limestone of which it is composed. Famous for their strikingly bold…