A simple, easy-to-use meter for measuring the pH of soil. You can quickly determine whether or not soil is suitable for particular plants, and if your soil pH needs to be adjusted. Soil pH preferences of over 400 plants are listed in an included fold-out along with detailed instructions for accurate measurements. Techniques and materials for adjusting soil pH, up or down, are also described. Includes meter, 4" probe, and probe cable. Requires no batteries or external power.