Save time and money with this professional soil test kit! Quickly and accurately test your soil for best plant performance! Sending out soil samples can take weeks to get your results back. You can literally save hundreds of dollars with this kit compared to sending your soil samples out! This professional kit allows for you to accurately and quickly test separately for pH, nitrogen, phosphorus and potassium. This large professional kit also comes with enough equipment to run three tests at a time! Each kit contains enough solutions for 50 tests of each type.