Soluble salt content which damages crop growth is

Salt is present in soluble form in saline soils, as well as in irrigation water. The excess salt content hampers the crop yield, thus it is lowered by adding fertilizers and other nutrients. Salinity affects production in crops, pastures, and trees by interfering with nitrogen uptake, reducing growth, and stopping plant reproduction.
Soluble salt content which damages crop growth is 0.1 - 0.2%.