For saline-sodic soils EC, ESP & pH values are

Soils that have detrimental levels of neutral soluble salts and a high proportion of sodium ions are classified as saline-sodic soils. Plant growth in these soils can be adversely affected by both excess salts and excess sodium levels.
For saline-sodic soils EC value is greater than 4, ESP is greater than 15, & pH values are greater than 8.5.