pH testing is a method used to measure the acidity or alkalinity of a solution. The pH scale ranges from 0 to 14, where values below 7 indicate acidity, values above 7 indicate alkalinity, and a value of 7 is considered neutral. This testing is essential in various fields, including agriculture, chemistry, and environmental science, as it helps determine the suitability of soil, water, and other substances for different applications. To perform a pH test, one can use pH strips, liquid indicators, or electronic pH meters. Each method provides a way to assess the pH level quickly and accurately. Understanding pH is crucial for maintaining healthy ecosystems, optimizing plant growth, and ensuring safe drinking water.