Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture.

ABSTRACT: Incipient groundwater salinization has been identified in many arid and semi-arid regions where groundwater is increasingly used for irrigation, but the dominant processes at stake in such context are yet uncertain. Groundwater solutes originates from various sources such as atmospheric inputs, rock dissolution and fertilizer residues, and their concentration is controlled by hydrological processes, in particular evapotranspiration. Here, we propose a deconvolution method to identify the sources and processes governing the groundwater Chloride concentration in agricultural catchments, using the relative variations of Sodium and Chloride and using a neighbouring pristine catchment as a reference for the release rate of Na by weathering. We applied the deconvolution method to the case of the

SUBMITTER: Buvaneshwari S 

PROVIDER: S-EPMC7048856 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature