The study looked at how adding different amounts of Ca(NO3)2 to tomato plants affected their growth under salty conditions. They found that high salt levels hurt the plants' growth and health, but adding 20 mmol/L of Ca(NO3)2 helped them grow better. This treatment increased the plants' dry weight, improved their root and shoot health, and boosted their ability to handle salt stress. Overall, adding Ca(NO3)2 at the right amount can make tomato plants stronger and healthier when dealing with salty conditions.