Luster Leaf Rapitest Soil Tester 1609CS 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 of N, P and K along with color coded test tubes Final assembly done in the USA Simple, fast, and accurate results; no experience required to perform tests Includes simple, yet complete instructions for adjusting soil conditions Luster Leaf 1609CS Seed Starting