Ch. 4
Order by
7 terms
Terms | Definitions |
|---|---|
 Agricultural Density: | -Important variant in pop. density -Excludes city pop. and reports the number of rurals per unit of agriculturally productive land -estimate of the pressure of people on the rural areas of a country |
| Arithmetic Density | -also known as crude density -most common and least satisfying expression of pop. density -calculation of the number of people per unit area of land, usually in political boundaries -only requires total pop. and total land area |
| Carrying Capacity | -Overcrowding is a reflection not of numbers per unit area, but of carrying capacity of land given to the prevailing tech. -Regions that devote to energy-intensive commercial agriculture that makes heavy use of irrigation, fertilizers, biocides, can support more people at a higher level of loving than one engaged in slash and burn agr. |
| Homeostatic plateu | -population is equal to carrying capacity of the area -When animals feel overcrowded they stop having babies -for us, population limitation must be self imposed |
| Physiological density | -when tot. pop. is divided by usable land area alone, resulting figure is this, whjich is an expression of pop. pressure exerted on agricultural land -calculations depend on uncertain definitions of usable and cultivated land |
| S-Curve | -top of this represents a pop. size consisted with and supported by the exploitable resource base. -It can express that humans are evidence of the ability to increase the carrying capacity of the land through technological advance |
| Zero Pop Growth | -condition for individual countries when births plus immigration equals deaths plus emigration -this increases pop. of older, fewer younger, rise in median age, and growing old age dependency ratio |
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