The Rapitest Digital Soil Tester utilizes advanced LED digital technology and patent pending optical calibration system to read test colors. The system is calibrated to read small color variations that can be difficult to distinguish with the human eye. The tester is easy to use.
.Just push test button to get results in a few seconds
.Includes pH preferences for over 450 plants and how to adjust soil pH
.Booklet has fertilizer guidelines based on nitrogen, phosphorus and potash test results
.Performs 10 tests 10 for pH and 5 each for nitrogen, phosphorus and potash