deficiency of rainfall
21Aridity index — An aridity index (AI) is a numerical indicator of the degree of dryness of the climate at a given location. A number of aridity indices have been proposed (see below); these indicators serve to identify, locate or delimit regions that suffer from …
22South Africa — This article is about the modern country. For other uses, see South Africa (disambiguation). Republic of South Africa …
23fruit farming — Introduction growing of fruit crops, including nuts, primarily for use as human food. The subject of fruit and nut production deals with intensive culture of perennial plants, the fruits of which have economic significance (a nut is a …
24pre-Columbian civilizations — Introduction the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …
25Drought — For other uses, see Drought (disambiguation). Fields outside Benambra, Victoria, Australia suffering from drought conditions. A drought (or drouth [archaic]) is an extended period of months or years when a region notes a deficiency in its water… …
26Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
27New South Wales — a state in SE Australia. 5,126,217; 309,433 sq. mi. (801,430 sq. km). Cap.: Sydney. * * * State (pop., 2001: 6,609,304), southeastern Australia. Bounded by Queensland, the Pacific Ocean, Victoria, and South Australia, it has an area of 309,130 sq …
28Queensland — /kweenz land , leuhnd/, n. a state in NE Australia. 2,295,123; 670,500 sq. mi. (1,736,595 sq. km). Cap.: Brisbane. * * * State (pop., 2001: 3,635,121), northeastern Australia. Bounded on the north by the Pacific Ocean and the Great Barrier Reef,… …
29Hookworm — Taxobox name = Necator americanus and Ancylostoma duodenale regnum = Animalia phylum = Nematoda classis = Secernentea ordo = Strongiloidae familia = Ancylostomatidae genus = Necator/Ancylostoma subdivision ranks = Species subdivision = Species N …
30River engineering — The Los Angeles River is extensively channelized with concrete embankments. River engineering is the process of planned human intervention in the course, characteristics or flow of a river with the intention of producing some defined benefit.… …
