Quantitative Estimation of Saline-Soil Amelioration Using Remote-Sensing Indices in Arid Land for Better Management

Soil salinity and sodicity are significant issues worldwide. In particular, they represent the most dominant types of degraded lands, especially in arid semi-arid regions with minimal rainfall. Furthermore, these areas, human activities mainly contribute to increasing degree soil salinity, dry areas. This study developed a model for mapping using remote sensing geographic information systems (GIS). It also provided management techniques (leaching gypsum requirements) ameliorate improve crop productivity. The results showed high correlation between electrical conductivity (ECe) remote-sensing spectral indices SIA, SI3, VSSI, SI9 (R2 = 0.90, 0.89, 0.87, 0.83), respectively. contrast, it low ECe SI5 0.21). salt-affected soils area cover about 56% cultivated land, which spatial distribution different levels ranged from 44% salinized moderate 27% 29% extreme 1% land. leaching water requirement (LR) depths 0.1 0.30 m ha?1, while (GR) 9 ton ha?1.