Developing a strategy to maintain or improve soil fertility, is challenging for the farming communities.  To harmonize the preservation of soil fertility with precision farming objectives there is a need for proper soil nutrient management strategies. These strategies should be based on data-driven information on the current status of the fertility of the soil. Hence, the soil analysis is a valuable tool in the management of costs, it contributes to optimizing inputs while taking into account environmental and sustainability concerns.

Large soil databases including soil analysis results have been established in many countries in the past decades. However, the differences in historical backgrounds of the countries, together with varieties of soil, climate, plant species and differences in the systems of agricultural production led to various soil testing procedures. One of the greatest difficulties is interpreting their results due to the different methodologies applied in different countries and laboratories. It can thus be said that each analytical method is speaking "different languages"

As we see there are several methods used worldwide and information about the different analysis methods should first be gathered in a harmonized way to compare the results and share experiences.

Despite traditional soil, tests are available in huge numbers, with learning more about soils analysis methods and their interpretations, could lead to a new dimension in the interpretation of soil analysis results in precision agriculture.

In conclusion not only the well-known extraction methods and the soil but also the chosen classification method of the properties and also, the statistical analysis (measuring all data or certain classes) affect the evaluation of P, Mg, Zn measurements. This comparative analysis study can provide a guide to interpret the different analysis methods on the way of harmonization.