Homeowners, farmers and others often test soil from their gardens, yards and fields. The soil tests tell them soil pH and the level of nutrients that are available for plant growth. The pH of the soil is a measurement of relative acidity. Soils that are too acid are not suitable for most plants. The amount and balance of nutrients in the soil has an effect on plant growth, too.
Low levels slow plant growth.
High levels can pollute the environment or cause imbalances. A soil test lets you know if you need to add more nutrients and how much, if any, to add. It can save you money and prevent water pollution. Test your soil at least once every three years. Keep the test results handy so you can monitor any changes in soil fertility.