Bodemanalyses

Bodemanalyses are laboratory investigations of soil samples to determine physical, chemical and sometimes biological properties. They are used to support agricultural management, environmental risk assessment, land remediation, and construction planning by providing objective information about soil quality, fertility and contamination.

Sampling and preparation are essential steps. Representatieve samples are collected from the field according to standardized procedures, often as a composite from multiple sub-samples and at specified depths (for example 0–20 cm for topsoil). Samples are dried, sieved and prepared before analysis. Accurate results depend on proper handling, labeling and avoiding cross-contamination.

Common analyses include soil pH and electrical conductivity to assess acidity/alkalinity and salinity; macronutrients such as nitrogen, phosphorus, potassium, and

calcium/m magnesium, as well as micronutrients like iron, manganese, zinc, copper, boron and molybdenum. Organic matter content, typically expressed as organic carbon, and soil texture or particle-size distribution are also measured, alongside cation exchange capacity and base saturation. In environmental contexts, analyses may cover contaminants such as heavy metals (lead, cadmium, arsenic, mercury), hydrocarbons, pesticides or PFAS.

Laboratories provide a report with measured values, reference ranges or target levels, and often practical interpretations and recommendations, for example lime or fertilizer requirements and limits for contamination. Results are usually produced by accredited laboratories following standardized methods (national or international guidelines).

Limitations include spatial variability, seasonal changes and methodological constraints. Therefore, interpretations should consider local agronomic conditions, crop needs and regulatory frameworks. Bodemanalyses enable evidence-based soil management and informed decision-making for land use and environmental protection.