Subsoil
41Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
42Foreign relations of Mexico — Mexico This article is part of the series: Politics and government of Mexico …
43Drainage — See also: Storm drain and Stormwater Deep inside a Sydney drain in New South Wales Drainage is the natural or artificial removal of surface and sub surface water from an area. Many agricultural soils need drainage to improv …
44Muleshoe, Texas —   City   The National Mule Memorial at the Muleshoe Chamber of Commerce office …
45Asphalt concrete — Asphalt concrete. As shown in this cross section, many older roadways are …
46Soil horizon — Soil samples illustrating horizons (subsoil on right) A soil horizon is a specific layer in the land area that is parallel to the soil surface and possesses physical characteristics which differ from the layers above and beneath …
47Česká Lípa — Coordinates: 50°41′19″N 14°32′19″E / 50.68861°N 14.53861°E / 50.68861; 14.53861 …
48Okara District —   District   Location of Okara in Punjab. Coordinates …
49Biorhexistasy — The Theory of Biorhexistasy describes climatic conditions necessary for periods of soil formation (pedogenesis) separated by periods of soil erosion. Proposed by pedologist H. Erhart in 1951, the theory defines two climatic phases: biostasy and… …
50Petrocalcic Horizon — A petrocalcic horizon is a diagnostic horizon in USDA soil taxonomy. They are formed when secondary Calcium Carbonate or other carbonates accumulate in the subsoil to the extent that the soil becomes cemented into a hardpan. Petrocalcic horizons… …
