Division of Remote Sensing Applications, ICAR-National Bureau of Soil Survey and Land Use Planning, Nagpur-440 033, Maharashtra, India
1ICAR-Central Coastal Agricultural Research Institute, Ela, Old Goa-403 402, Goa, India
2Department of Soil Science and Agricultural Chemistry, College of Agriculture, Indira Gandhi Krishi Viswavidyalaya, Raipur-492 012, Chhattisgarh, India
The aim of this review paper is to provide a comprehensive overview of remote sensing-based mapping of salt affected soils. By providing multispectral and multi-temporal low cost data at various resolutions, remote sensing plays an important role for identifying and mapping the distribution of salt affected soils. Different bands of the multispectral data and the indices and transforms derived from them have been found useful in delineating salt affected soils. The various approaches to map salt affected soils involving remote sensing data, from visual interpretation to supervised and unsupervised classifications have been discussed. Quantitative mapping of soil salinity with remote sensing and other environmental variables have also been discussed.
Remote sensing, Salinity indicies, Salt affected soils, Visual interpretation
