Rapitest Soil Tester 10 Tests
An economical soil test kit for testing soil pH, Nitrogen (N), Phosphorus (P) and Potash (K). Contains (10) total tests: (4) for pH and (2) for each N, P and K along with color coded test tubes. Simple, fast and accurate results; no experience required to perform tests. Includes simple, yet complete instructions for adjusting soil conditions.