trench agriculture

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• Trench — A trench is a type of excavation or depression in the ground. Trenches are generally defined by being deeper than they are wide (as opposed to a wider gully or ditch), and by being narrow compared to their length (as opposed to a simple hole). [… …   Wikipedia

• Missouri River Trench — The Missouri River Trench is the geological name applied to the broad valley of the Missouri River as it flows southward through North Dakota and South Dakota in the United States. The valley averages approximately 1 mi (1.6 km) wide, with the… …   Wikipedia

• Drill (agriculture) — In agriculture and gardening, a drill is a shallow furrow in which seeds or bulbs are placed during seeding. A drill is commonly created by dragging a hoe through the soil in a straight line, leaving a furrow of a centimeter or two for smaller… …   Wikipedia

• irrigation and drainage — ▪ agriculture Introduction  artificial application of water to land and artificial removal of excess water from land, respectively. Some land requires irrigation or drainage before it is possible to use it for any agricultural production; other… …   Universalium

• farm building — ▪ agriculture Introduction       any of the structures used in farming operations, which may include buildings to house families and workers, as well as livestock, machinery, and crops.       The basic unit of commercial agricultural operation,… …   Universalium

• United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

• Biointensive — The biointensive method is an organic agricultural system which focuses on maximum yields from the minimum area of land, while simultaneously improving the soil. The goal of the method is long term sustainability on a closed system basis. It has… …   Wikipedia

• international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

• cañada — /keuhn yah deuh, yad euh/, n. Chiefly Western U.S. 1. a dry riverbed. 2. a small, deep canyon. [1840 50; < Sp, equiv. to cañ(a) CANE + ada n. suffix] * * * Canada Introduction Canada Background: A land of vast distances and rich natural resources …   Universalium

• Canada — /kan euh deuh/, n. a nation in N North America: a member of the Commonwealth of Nations. 29,123,194; 3,690,410 sq. mi. (9,558,160 sq. km). Cap.: Ottawa. * * * Canada Introduction Canada Background: A land of vast distances and rich natural… …   Universalium

• North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium