This standard defines terms used in the field of soil quality. The terms are classified under the following main headings:  general terms and definitions (terms relating to soil, to soil materials, to land and sites);  description of soil (soil characteristics, soil water, properties of soils and substances, processes in soil, contamination, background content);  sampling (general terms and definitions, sample types/sampling type, sampling stages, execution of sampling, quality control samples, sample pretreatment, terms and definitions related to geostatistics);  terms and definitions relating to the assessment of soils (quality, assessment of soil and sites with respect to risk, hazard and exposure, soil protection);  remediation (general terms and definitions, principal remediation types, engineering-based methods, process-based treatment methods). An alphabetical index is provided.