total soil water potential
51Cover crop — Agriculture General …
52Edgar Buckingham — Infobox Scientist name = Edgar Buckingham caption = birth date = birth date|1867|7|8|mf=y birth place = Philadelphia, PA death date = death date and age|1940|4|29|1867|7|8|mf=y death place = Washington DC, U.S. residence = U.S. nationality = U.S …
53Columbia River — Coordinates: 46°14′39″N 124°3′29″W / 46.24417°N 124.05806°W / 46.24417; 124.05806 …
54PRADAN — is a non government organisation in India.Overview PRADAN is a voluntary organisation registered under the Societies Registration Act of India. Established in Delhi in 1983, PRADAN was pioneered by a group of young professionals, all of whom were …
55Sustainability — Achieving sustainability will enable the Earth to continue supporting human life as we know it. Blue Marble NASA composite images: 2001 (left), 2002 (right). See also: Sustainable development Sustainability is the capacity to endure. For humans,… …
56Bulgaria — /bul gair ee euh, bool /, n. a republic in SE Europe. 8,652,745; 42,800 sq. mi. (110,850 sq. km). Cap.: Sofia. * * * Bulgaria Introduction Bulgaria Background: The Bulgars, a Central Asian Turkic tribe, merged with the local Slavic inhabitants in …
57Climate — For other uses, see Climate (disambiguation). Worldwide Climate Classifications Climate encompasses the statistics of temperature …
58China — <p></p> <p></p> Introduction ::China <p></p> Background: <p></p> For centuries China stood as a leading civilization, outpacing the rest of the world in the arts and sciences, but in the 19th and… …
59Chad Basin — The Chad Basin, also known as the Lake Chad Basin, is a large lowland area in north central Africa. In all directions from the center of this area the elevation changes are gentle. The Chad Basin is an endorheic (closed) basin its water does not… …
60Human security — is an emerging paradigm for understanding global vulnerabilities whose proponents challenge the traditional notion of national security by arguing that the proper referent for security should be the individual rather than the state. Human… …
