SIST ISO 18400-205:2019 PDF

Overview

ISO 18400-205:2018 - "Soil quality - Sampling - Part 205" provides practical guidance for the investigation and sampling of soils on natural, near‑natural and cultivated sites. It covers soils from forests and woodlands, arable and pasture land, horticultural plots (gardens, allotments), orchards, vineyards and commercial plantations. The standard supports field investigations and the collection of samples for chemical, geochemical, physical and biological laboratory characterization and sets out strategies for sampling programme design, field procedures and sample handling prior to pretreatment (e.g., drying, milling).

The document is intended to be used with other ISO 18400 series parts and recommends phased investigations (preliminary, exploratory and detailed) and development of a conceptual site model to guide sampling decisions.

Key topics and requirements

• Objectives of sampling: define investigation goals (soil quality, nutrient status, monitoring, specimen banking, etc.) to shape sampling design.
• Sampling strategy and programme design: develop sampling plans that reflect site history, land use and investigation phase.
• Conceptual site model: use available data to inform where and how to sample.
• Types of samples and sampling locations: guidance on selecting representative points across natural and cultivated land.
• Sampling depths and sample sizes: considerations for discrete depths and composite samples depending on objectives.
• Sampling techniques and field procedures: recommended approaches for collecting soil for different analyses.
• Sample handling, containers, transport and storage: preserve sample integrity from field to laboratory prior to pretreatment.
• Quality assurance and control (QA/QC): ensure traceability, reproducibility and validity of results.
• Safety and legal considerations: field safety and environmental protection during sampling.
• Special cases: additional guidance for peat, saturated-zone soils, forest soils, mobile nitrogen sampling and special land uses.
• Reporting: required elements for sampling reports and investigation reports to document methods and findings.

Applications and users

ISO 18400-205 is used by:

• Environmental consultancies performing soil quality assessments and monitoring.
• Soil scientists, agronomists and foresters designing sampling programmes for nutrient management or ecosystem studies.
• Laboratories receiving and processing field-collected soil samples.
• Regulators and land managers establishing monitoring networks and evaluating land use impacts.
• Researchers and specimen banks creating reproducible soil archives.

Typical applications include soil quality evaluation, nutrient supply assessment, agricultural management, forest soil studies, ecological monitoring and preparation of samples for chemical and biological analysis.

Related standards

• ISO 18400 series (sampling): ISO 18400-101, -103, -104, -202, -203, -206
• ISO 11074 (soil vocabulary)
• ISO 5667 (water sampling - relevant for water–soil interactions)
• ISO 15175 (relationship between soil properties and groundwater quality)

Keywords: ISO 18400-205, soil sampling, soil quality, sampling strategy, site investigation, soil sample handling, soil monitoring, soil assessment.