A pH meter. This measures the concentration of hydrogen ions in soils. A small glass electrode at the end of a steel probe is pushed into the soil being tested. The presence of hydrogen ions changes the electrical potential between a test electrode and standard electrode within the probe - this difference is directly related to the pH (negative log of the concentration of hydrogen ions). The principal purpose is to show the acidity or alkalinity of the soil | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4500 px × 4500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |