three-field system of agriculture
71ICES Intertemporal Computable Equilibrium System — affects regional and world economies. The model has been developed at the Climate Change Modelling and Policy Research Programme of the Fondazione Eni Enrico Mattei – FEEM, a research institution in the field of sustainable development.… …
72France — /frans, frahns/; Fr. /frddahonns/, n. 1. Anatole /ann nann tawl /, (Jacques Anatole Thibault), 1844 1924, French novelist and essayist: Nobel prize 1921. 2. a republic in W Europe. 58,470,421; 212,736 sq. mi. (550,985 sq. km). Cap.: Paris. 3.… …
73Mesopotamia, history of — ▪ historical region, Asia Introduction history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… …
74Poland — /poh leuhnd/, n. a republic in E central Europe, on the Baltic Sea. 38,700,291; ab. 121,000 sq. mi. (313,400 sq. km). Cap.: Warsaw. Polish, Polska. * * * Poland Introduction Poland Background: Poland is an ancient nation that was conceived around …
75Early Middle Ages — The Early Middle Ages is a period in the history of Europe following the fall of the Western Roman Empire spanning roughly five centuries from AD 500 to 1000. [Events used to mark the period s beginning include the sack of Rome by the Goths (410) …
76Mexico — /mek si koh /, n. 1. a republic in S North America. 97,563,374; 761,530 sq. mi. (1,972,363 sq. km). Cap.: Mexico City. 2. a state in central Mexico. 6,245,000; 8268 sq. mi. (21,415 sq. km). Cap.: Toluca. 3. Gulf of, Mexican, Golfo de México /gawl …
77Plough — Plow redirects here. For the Canadian soldier, see Edward Chester Plow. Plowman redirects here. For the surname, see Plowman (surname). Furrow redirects here. For other uses, see Furrow (disambiguation). For other uses, see Plough… …
78Horses in the Middle Ages — This 15th century depiction of Charlemagne and Pope Adrian I shows a well bred medieval horse …
79crop rotation — the system of varying successive crops in a definite order on the same ground, esp. to avoid depleting the soil and to control weeds, diseases, and pests. [1905 10] * * * Successive cultivation of different crops in a specified order on the same… …
80Ostsiedlung — This article is about the medieval eastward migrations of Germans. For a general view, see History of German settlement in Eastern Europe. History of Germany …
