NPK Soil Testing Kit
Extract and test soil for nitrogen, phosophorus and potassium
This popular kit provides everything you need to extract nutrients from soil samples and perform N, P and K tests for each. Includes N, P, K and Floc Ex tablets, a graduated extraction tube, a pipet, a water-resistant color chart for interpreting results and turbidity chart. Illustraded step-by-step instructions also included. Performs 50 tests. USA made.
2015 Master Catalog: Page 463