FAO reports that 10% of global cropland is affected by salinity, and this could rise to 32% with climate change, mainly impacting developing countries. Ten countries, including Afghanistan, Australia, and China, account for 70% of the world's salt-affected soils.

https://krishijagran.com/agriculture-world/14-billion-hectares-of-land-impacted-by-salinity-threatening-food-security-finds-fao-report/