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Computerized database on salt affected soils in western and central India using GIS

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Title Computerized database on salt affected soils in western and central India using GIS
Not Available
 
Creator A. K. Mandal a; R. C. Sharma
 
Subject salt affected soils; saline soil; sodic soil; agroclimatic region; agroclimatic zone; database; GIS
 
Description Not Available
Salt affected soils occupy significant areas in western and central India manifested by the
arid and semiarid climate, sandy/clayey soil texture, absence of natural drainage, and
inadequate infrastructure and irrigation development. These soils are productive
following reclamation and appropriate management. The National Remote Sensing
Agency, Hyderabad (India) published state-wise maps of salt affected soils in India on
1:250,000 scale using a legend that includes physiography, soil characteristics, and the
aerial extent of the mapping units. In the analogue form, voluminous data contained in
such maps were difficult to handle by users of varied backgrounds. An attempt was
made to prepare a computerized database of salt affected soils for easy access, retrieval,
and manipulation of spatial and attribute data useful for management of salt affected
soils. The salt affected soils maps were prepared, for Rajasthan, Gujarat, Madhya
Pradesh, and Maharashtra states, overlaying digitized layers of SAS polygons and the
Survey of India basemap using the ILWIS (Integrated Land and Water Information
System) software. GIS was used to prepare a composite (master) database of western
and central India that showed the extent and distribution of salt affected soils. A
relational database was prepared combining the digitized polygons with soil
characteristics such as nature and degree of salinity (presence of higher concentration
of neutral salts and neutral soil reaction), sodicity (presence of higher concentration of
basic salts and alkaline reaction) and ground coverage. The regional and zonal
databases of salt affected soils were prepared at a suitable scale overlaying agro-climatic
regions agro-climatic zones. Spatial relation of salt affected soils with physiography,
climate, geology, and agro-eco-sub-regions were evaluated employing map calculations
in GIS. Saline soils were prevalent in Gujarat, and Rajasthan while sodic soils were
dominant in Maharashtra and Madhya Pradesh. These were distributed primarily in the
arid (B) plain of Rajasthan, alluvial (A) and coastal (D) plains of Gujarat, and
peninsular plain (F) of Maharashtra and Madhya Pradesh. It occupied 2,596,942 ha
(78%) in the western (Rajasthan and Gujarat) and 733,608 ha (22%) in the central
(Madhya Pradesh and Maharashtra) regions. The SAS occupied 3.3 million ha in the
western and central region constituting 50% of the total salt affected soils in India. The
saline and sodic soils occupied 2,069,285 ha (62%) and 1,261,266 ha (38%), respectively.
Not Available
 
Date 2019-12-06T11:26:15Z
2019-12-06T11:26:15Z
2008-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/28508
 
Language English
 
Relation Not Available;
 
Publisher Taylor and Francis