ODM2 Medium Controlled Vocabulary ODM2 Group A vocabulary for describing the physical medium of a specimen, reference material, or sampled environment. Soil Specimen collected from soil or sensor emplaced to measure properties of soil. Soil includes the mixture of minerals, organic matter, gasses, liquids, and organisms that make up the upper layer of earth in which plants grow. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php