Largest area under salt affected soil in which state in india
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Rajasthan is the state
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Land is facing serious threats of deterioration due to unrelenting human pressure and utilisation incompatible with its capacity. The
information on land degradation is needed for a variety of purposes like planning reclamation programs, rational land use planning,
for bringing additional areas into cultivation and also to improve productivity levels in degraded lands. Land degradation has
numerous environmental, economic, social and ecological consequences. There can be rather serious effects in terms of soil
erosion, loss of soil fertility and thus reduced plant growth or crop productivity, clogging up of rivers and drainage systems, extensive
floods and water shortages.
It is estimated that some forms of land degradation constituting 75% of the earth’s usable landmass affect 4 billion people in the
world. About 15% of the world population is effected by land degradation which is likely to worsen unless adequate and immediate
measures are taken to arrest the degradation processes. The largest category is land affected by water and wind erosion, which
account for 80 percent of degraded followed by salinization / alkalization and waterlogging. Reliable time series data are available
only for salt affected land, which has grown from 7.18 million hectares in 1987 to over 10 million in 1993 (Annon, 2002). According
to NRSA / DOS project on ’Mapping of salt affected soils of India on 1:250,000 scale’, the area under salt affected soils in the
country is 6.727 million hectares.
An estimated area of 2.46 million ha land is suffering from water logging in irrigation commands in India (Anonymous, 1991). “An
area is said to be waterlogged when the water table rises to an extent that soil pores in the root zone of a crop become saturated,
resulting in restriction of normal circulation of the air, decline in the level of oxygen and increase in the level of carbon dioxide”. Itmay result in various types of soil degradation like physical degradation or chemical degradation or salinity. Satellite data are being
used regularly for mapping and monitoring of waterlogged areas.
information on land degradation is needed for a variety of purposes like planning reclamation programs, rational land use planning,
for bringing additional areas into cultivation and also to improve productivity levels in degraded lands. Land degradation has
numerous environmental, economic, social and ecological consequences. There can be rather serious effects in terms of soil
erosion, loss of soil fertility and thus reduced plant growth or crop productivity, clogging up of rivers and drainage systems, extensive
floods and water shortages.
It is estimated that some forms of land degradation constituting 75% of the earth’s usable landmass affect 4 billion people in the
world. About 15% of the world population is effected by land degradation which is likely to worsen unless adequate and immediate
measures are taken to arrest the degradation processes. The largest category is land affected by water and wind erosion, which
account for 80 percent of degraded followed by salinization / alkalization and waterlogging. Reliable time series data are available
only for salt affected land, which has grown from 7.18 million hectares in 1987 to over 10 million in 1993 (Annon, 2002). According
to NRSA / DOS project on ’Mapping of salt affected soils of India on 1:250,000 scale’, the area under salt affected soils in the
country is 6.727 million hectares.
An estimated area of 2.46 million ha land is suffering from water logging in irrigation commands in India (Anonymous, 1991). “An
area is said to be waterlogged when the water table rises to an extent that soil pores in the root zone of a crop become saturated,
resulting in restriction of normal circulation of the air, decline in the level of oxygen and increase in the level of carbon dioxide”. Itmay result in various types of soil degradation like physical degradation or chemical degradation or salinity. Satellite data are being
used regularly for mapping and monitoring of waterlogged areas.
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