Explanation
Land which were taken up for cultivation but have been temporarily put off cultivation for a period of not less than one year buy not more than five years due to poverty of the cultivators, inadequate supply of water, malarial climate, silting of canals and rivers, unremunerative nature of farming etc. are treated as other fallow land. The land under this category was the highest in Tirunelveli district and ranked first contributing 10.9% to the total area of the state under this category.
The agricultural and forestry land is mainly used for the crop cultivation, plantation or for Agro based productions in terms of timber, cash crop plantation, bio productive plantation for constructing the entire township and infrastructural development.
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.
There are six Mojar type of soils found in India.
1-Alluvial soils 14.25 lakh sq. km area (43.4%)
2-Red soils 6.1 lakh sq. km area (18.6%)
3- Black or Regur soils area 49.8 million ha. (15%)
4- Desert / Arid soils 1.42 lakh sq. km area (4.3%)
5- Laterite soils 1.22 lakh sq.km area (3.7%)
Major soil of North India is Alluvial soil and mostly in northern plains or northern Indian states like Punjab, Haryana, Uttar Pradesh, Bihar etc.
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.
The cumulative area sown with crops and orchards is the net area sown. It is a region in which the total number of crops is produced only once a year. The total area sown with crops and orchards once or more in one year is the gross cropped area. It also includes the net area that is sown.
The correct answer is B .
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 .
Intensive leaching is the primary explanation for the formation of laterite soils. Owing to heavy tropical rainfall more than 200 cms and high temperatures, leaching occurs. Lime and silica are leached away as a result of high precipitation, and soils rich in iron oxide and aluminium compounds are left behind.
The correct answer is C .
Under conditions of heavy rainfall, the laterite soil is formed. Due to alternate wet and dry cycles, they are the result of extreme leaching. Heavy rainfall leaches out all soluble materials, leaving behind a high proportion of residual (remaining), insoluble iron and aluminium oxides in the soil from the top layer of the soil. Laterite soil is considered such soil. It is built in regions that receive heavy rainfall.
The correct answer is A.
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).
Typically found in lava-covered areas, soils are generally referred to as "black cotton soils." The term black cotton soil is coined because in the region where the black soil is found, cotton is the typical crop. Black soil is created by the weathering of lava (a igneous rock) and the cooling of lava after a volcanic eruption. Rich in humus, iron and also high quality magnesia, lime and alumina.
The correct answer is A .
Please disable the adBlock and continue. Thank you.
