 The soil family designation is much more specific; e.g., Orthic Gray Luvisol, clayey, mixed (mineralogy), cold, subhumid.Series have a vast array of properties (e.g., horizon thickness and colour, gravel content, structure) that fall within a narrow range.Thus, for example, the series name Breton implies all the basic properties of the Luvisolic order, the Gray Luvisol great group, the Orthic Gray Luvisol subgroup and the fine, loamy, mixed, cold subhumid family of that subgroup as well as series-specific properties.