Utah State University Extension
Salinity is a measure of the total amount of soluble salts in soil. As soluble salt levels increase, it becomes more difficult for plants to extract water from soil. Some plants are more resistant than other’s, but as the salt levels exceed their ability to extract water, they become water stressed.
Parent, Vernon and Koenig, Rich, "Solutions to Soil Problems: I. High Salinity (Soluble Salts)" (2010). All Current Publications. Paper 954.