High salinity levels in irrigation water can lead to reduced crop growth, decreased yields, and even plant death. Salinity can cause osmotic stress, making it difficult for plants to absorb water and nutrients. Additionally, high salt concentrations can disrupt nutrient uptake, alter soil structure, and increase soil erosion. In severe cases, high salinity can also lead to soil salinization, rendering the soil unsuitable for future crops. It is essential to monitor and manage salinity levels in irrigation water to prevent these negative impacts on crop growth.