Soil pH measures the acidity or alkalinity of soil, which affects plant growth and nutrient availability. It is measured on a scale from 0 to 14, with 7 being neutral. Values below 7 indicate acidic soil, while values above 7 indicate alkaline soil. Different plants thrive in different pH levels, making it essential for gardeners and farmers to understand their soil's pH. Maintaining the right soil pH is crucial for optimal plant health. For instance, vegetables like tomatoes prefer slightly acidic soil, while blueberries thrive in more acidic conditions. Regular testing can help manage soil pH effectively, ensuring better crop yields and healthier plants.