The plains generally have deep and fertile soil.
Since the plains have a flat surface, the means of irrigation are easily developed.
Both these factors have made the plains agriculturally so important that they are often called ‘food baskets of the world’.
The rich agricultural resources, especially of alluvial plains, have helped in the growth of agro-based industries.
This has given employment to millions of people and has registered a marked increase in national production and per capita income.
Since the plains are thickly populated, plenty of labor is available for the intensive cultivation and for supplying the workforce for industries.
Since the plains have an even surface it favors the building of roads, airports and laying down of railway lines.
The plains have been the centers of many modern and ancient civilizations.
The major river valley civilizations of the world have flourished in the plains only.
Hence, they are aptly referred to as the cradles of civilization.
For example, there is the civilization of the Indus and the Nile Valley.
Easy means of transport on land, the growth of agriculture and industries in plains have resulted in the setting-up and expansion of cities and towns.
The most developed trade-centers and ports of the world are found in the plains only.
Rome, Tokyo, Calcutta, Yangoon (Rangoon), Varanasi, Paris and other famous cities are situated in the plains.
As much as 80% of the world’s population lives in the plains.
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