The use of chemical fertilizers increases the effect of salinity in the soils. The presence of salts in water and soil reduce the availability of water to the plants at the point where crop yields are affected. Growth and yield decrease gradually with the increase of salinity because plants need more energy to extract water from the soil.
The higher the salt index, the higher the fertilizer "burn" potential.
Super Greensand®’s salinity index is very low when compared to chemical fertilizers:
Did you know? Potassium chloride (KCl) has one of the highest salt indexes of all commercial fertilizers.
The salt index of table salt (sodium chloride) is 153.