Answer
It balances the soil pH, strengthens the lawn, improves its color, and stabilizes the soil structure.
Explanation
A soil well-balanced in calcium reduces acidity, thus limiting the growth of weeds. It strengthens the cell structure of plants, making them more resistant to diseases and weather conditions. Additionally, it promotes a dark green color by optimizing nutrient absorption. Finally, it improves soil structure by preventing compaction, making it easier for water and nutrients to circulate.