The ideal pH range for irrigation water varies depending on the crop and soil type. Generally, a pH range of 6.0-8.0 is considered suitable for most crops. Water with a pH outside this range can lead to reduced nutrient availability, increased soil erosion, and decreased crop growth. For example, acidic water (pH < 6.0) can increase the availability of toxic aluminum ions, while alkaline water (pH > 8.0) can reduce the availability of essential micronutrients like iron and zinc. Understanding the optimal pH range for irrigation water is critical to maintaining healthy crop growth and soil conditions.