A number of analysis of the soil can be executed immediately in the field. The determination of the pH and the nitrate content are soil analysis that frequently occur.
The Hellige pH-indicator is a very simple apparatus to estimate the pH (acidity) of a soil for the purpose of a soil suitability indication and straight forward fertilizing advise. The pH is determined on the basis of colour comparison.
Hellige pH-indicator for soil, measuring range pH4 - pH9, (inclusive 50 cc indicator fluid, for about 50 pH-tests)