Madison Co. SWCD provides soil testing for the establishment and maintenance of lawns, gardens, and trees. Our tests provide information on the soil's nutrients, pH, and recommendations for care based on the information provided. The tests require about 16 ounces of soil and information on the location and plants present in the area. It is highly recommended to perform soil tests in the fall or spring before applying fertilizer to your lawn or garden. Results can take several weeks to receive during busy season.