75 research outputs found
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No full textNot AvailableGrowing human population is continuously increasing pressure on natural resources, which calls for their optimum
utilisation.Not Availabl
In:Reddy, G.P.O. and Singh, S.K. (eds) Geospatial Technologies in Land Resource Mapping, Monitoring and Management.
No full textNot AvailableNature, extent, and reliability of spatial data on land resources become the imperative need of the present day for scientific utilization of land resources and sustainable management. In land resource inventory and mapping, the applications of remotely sensed data and geographic information system (GIS) are found to be not only timesaving but also economic in generation of base maps and conducting of soil survey. Further, high-resolution remote sensing and applications of GIS have made the task of land resource inventory and mapping cost effective and time efficient. Depending upon the objective, method and intensity of land resource surveys and scale, the type of satellite data to be selected to generate the base maps in order to show the details of survey information. A detailed soil survey provides sufficient information about various kinds of soils, including problematic or degraded soils, and is immensely useful for resource appraisal and development of alternative strategies for land use and site-specific agricultural development. As a case study, a detailed land resource survey was conducted in Piprakothi Block under Purba Champaran district of Bihar, and it shows that soils are very deep, well to somewhat poorly drained, and highly calcareous. Soils suffer from waterlogging, frequent flooding, drainage congestion, calcareousness, salinity, and multi-nutrient deficiency, affecting the crop yield. Soil-site suitability evaluation of sugarcane in the soils of the block indicates that 31.7% of the area is moderately suitable for the cultivation of sugarcane due to moderate limitation of soil fertility and 53.0% of the area is marginally suitable due to relatively low water availability and severe soil fertility limitations.Not Availabl
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No full textNot AvailableSoils of Peruguda micro-watershed, developed on geologically complex terrain under semi-arid tropical climate of Ranga Reddy district, Andhra Pradesh, India were studied for their morphological, physical and chemical characteristics with a view to map the erosion risk zones using Remote Sensing and Geographic Information System (GIS). Soils developed under seven physiographic units viz., mesa top, mesa shoulder, mesa side slope, mesa foot slope, rocky ridge, undulating plain and narrow to broad valley were mapped and 23 soil mapping units have been identified. The soils vary in depth, drainage, surface texture, pH and organic carbon. The study of land use/land cover indicates that about 44.2% area is under rainfed agriculture. Based on the image characteristics, soil and site characteristics and land use/land cover, four erosion classes have been identified in the microwatershed. The soils of side slopes of undulating plain, mesa shoulder, dissected valley fill as evidenced by the dark to light blue, yellow, white mixed tone covering 33.59% area of the micro-watershed is under the threat of severe erosion hazard while soil of mesa side slope, rocky ridge and narrow to broad valley, covering an area of 5.01%, is under very severe erosion hazard as evidenced by the dark blue, yellow and white mixed tone in the satellite imagery. The study indicates an amount of 8940.2 to 17812.4 tonnes of soil loss yr−1 from the micro-watershed. The mapping of erosion risk zones using remote sensing and GIS in the microwatershed helped to identity high erosion risk zones, which needs more attention towards the protection and conservation of natural resources through suitable soil and water conservation measures.Not Availabl
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