Cultivable areaとは 意味・読み方・使い方

Where the pattern of settlement of different populations is to be compared and other factors besides surface area are taken into account, comparative density indices ¹ are sometimes computed. There are various such indices, among which we may mention the density of population per unit of cultivable area ² and the density of the agricultural population per unit of cultivable area ³. Occasionally these indices are based on the cultivated area ⁴ rather than the cultivable area ⁵. The density may also be expressed as a relation between population and total economic resources; the maximum potential density ⁶ or population carrying capacity ⁶, showing the relationship between resources and the maximum population that can be supported with these resources, may be considered. The concept of optimum density ⁷, i.e., the density which will give the maximum real income per head with given resources, is used in population theory. More...