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Kalra N.K.,State Remote Sensing Application Centrre | Singh L.,State Remote Sensing Application Centrre | Kachhwah R.,State Remote Sensing Application Centrre | Joshi D.C.,State Remote Sensing Application Centrre
Journal of the Indian Society of Remote Sensing | Year: 2010

Soil is an integral part of ecosystem nurturing the biological system. Sustainable management of soil resources based on the consideration of constraints is the key to check land degradation and maintain productivity of biological system. To meet the objective remote sensing and GIS technology has been employed for identification of soil constraints in resource potential Bhilwara district. IRS LISS-III FCC images were interpreted for soil constraints using physiography soil approach, verified through field checking and laboratory analysis. On IRS LISS-III FCC images the salt affected soils of Kotri and Taswaria appeared in bright white to light grey tone, smooth texture with white mottles. These were also verified during ground truth and soil analysis for salinity (EC 2.90-3.32 dS m-1) and sodicity (pH 9.50-9.86 and ESP 17.60-19.05). Similarly on the LISS III FCC, constraints due to water erosion near Bir, Sareri and Vijaypura soil series were apparent in light grey to whitish tone, intercepted by medium grey streaks indicating streams and exposed sub-soil. The constraints due to shallow depth associated with rock out crops and hilly areas of Balda and Delwara series appeared in greenish grey tone and coarse texture. There was close relationship between image characteristics, field observation and analytical data. The study revealed that out of total geographical area of the district, 17 per cent area has constraints due to salinity/sodicity and physical properties, which need efforts to overcome through amelioration and management to realize high crop yields. About 48 per cent area have constraints due to uneven terrain, shallow soils mixed with gravels, low AWC, low nutrient retention, moderate-to severe erosion which are difficult to overcome and these areas should be put under silvi-pasture management. Remaining 31 per cent area has no soil constraint, the soils have high potential, and with intensive irrigation and nutrient management high crop yield can be realized. © 2010 Indian Society of Remote Sensing.

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