- No hazardous compounds required for testing
- Colorimetric determination of soil components
- Instructions included
This kit lets students use a simple three-step process involving water, tablets and color comparators. To test soil, simply mix it with water and let it settle. Then pour the liquid off into the color comparator, add a tablet and compare the liquid with the color film chart for a test reading.
470104-846 includes 10 pH soil test kits and fully instructions.
470175-090 includes 10 tests each for pH, nitrogen, phosphorus and potash and full instructions.