Land-use and topography shape soil and groundwater salinity in central Argentina

摘要: Abstract Being one of the oldest and most serious environmental problems, soil groundwater salinization poses critical challenges for managing agricultural natural areas. Together with climate, topography land-use are main controls dictating salt accumulation patterns at different spatial scales. In this paper, we quantified response to interactive effects (lowland-upland gradients) vegetation (annual crops, tree plantations, native grasslands) across a sub-humid sedimentary landscape shallow in Inland Pampas Argentina. We measured stocks from surface down water-table through coring their horizontal distribution electrical-resistivity imaging eleven fields occupied by annual eucalyptus plantations grasslands, encompassing depth gradients 1–6 m below surface. Land-use exerted strong influences on salinity explained together 82% 66% variability (0–2 m depth), respectively. As single explanatory variable, overwhelmed patterns. Tree stored 7–8 times more salts than croplands grasslands throughout unsaturated profile areas water-tables (