ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Soil coarse fraction Fraction of particles within a soil sample that are greater that 2mm in diameter http://info.reynoldscreekczo.org/dokuwiki/doku.php?id=soil_texture, https://en.wikipedia.org/wiki/Soil_texture Added to support Critical Zone Observatory (CZO) data use cases.