Measures soil pH just like the Item #1840, but also has a separate probe for fertility measurements. Comes with instruction booklet on how to alter pH and fertility to meet your needs.
The Soil Tester is virtually indestructible in its solid state construction, gives accurate readings, will not stain hands or clothing, requires no solutions and is factory calibrated to known chemical standards. In other words, it is well adapted for its intended use.
The pH portion of the soil tester utilizes the chemical reaction known as oxidation reduction to measure pH within the range of 1 through 9, where pH 7 (neutral) is the pointer’s resting point. Its primary function is to quickly discern an acid soil from an alkaline soil and after one minute, a weak acid/alkaline from strong acid/alkaline soil.
The fertility portion of the soil tester measures the soil’s Nitrogen, Phosphorous and Potash (NPK) content, in combination. The method used is termed conductometrics wherein a 1.5 volt AA battery is used.
| Too Little | Ideal | Range Too Much | |
|---|---|---|---|
| Nitrogen | 50 PPM | 50 to 200 ppm | 200 PPM |
| Phosphorous | 4 PPM | 4 to 14 ppm | 14 PPM |
| Potash | 50 PPM | 50 to 200 ppm | 200 PPM |
The phamplet covers all aspects related to the tester’s function and will help guide you to experiencing the proper pH and fertility range for the plants you intend to be growing.
The cleaning pad supplied with this soil tester has been specially selected for its compatibility with the soil tester probe metals. Other type of cleaners may cut or otherwise damage probe surfaces and/or adversely affect soil tester readings.