Resources and Development Test - 29

Lands that are kept fallow out of the net area sown during the previous year are classified as current fallow for the reporting year. Land area under current fallow is more in Coimbatore district followed by Tiruvannamalai and Vellore. These districts together accounted for 50.8% of the total area of the state under this category.

• Soil research has shown that soil profiles are influenced by five separate, yet interacting, factors: parent material, climate, topography, organisms, and time.
  
•  Soil scientists call these the factors of soil formation.

The land put to use for purposes other than agriculture such as buildings, pathways, roads, social forests, bus stands, railway tracks, canals, rivers, local reservoirs, swamps, marshy and water logged areas, lands under still water etc. are brought under put to Non Agricultural Uses.  In Chennai district about 98.3% of its geographical area is put to non-agricultural uses because it is metropolis.

Uttar Pradesh, a state mostly having fertile alluvial soil due to the Northern Plains, has most of its land under cultivation as compared to other states given in the options.

Soils are created by the sediments that rivers carry down. In the course of their long journey, the rivers inject very fine particles of soil called alluvium onto their plains. It is a mixture, called loam, of sand , clay and silt. Three major river systems, the Indus, the Ganga, and the Brahmaputra, have deposited them. 40 percent of the land area is covered by these soils.

The correct answer is D .

 

Soil Erosion is the action of exogenous processes that strip soil and rock from one location on the crust of the Earth and then transport it to another location where it is deposited (such as water flow or wind).

The correct answer is D .