natric horizon

natric horizon

[′nā·trik hə′rīz·ən]
(geology)
A soil horizon that has the properties of an argillic horizon, but also displays a blocky, columnar, or prismatic structure and has a subhorizon with an exchangeable-sodium saturation of over 15%.
References in periodicals archive ?
Some RSGs do consider subsoil (but not specifically B2 horizon) structure and grade, such as the nitic horizon (Nitisols), whereas others, such as the natric horizon (Solonetz), consider ped shape but lack any structure grade criteria.
The natric horizon of ST requires the presence of strong blocky to prismatic peds and an ESP >15.
Others have a natric horizon at depth and either waterlogging on top of the B-horizon (Aquic Natrixeralf), or no waterlogging (Typic Natrixeralf).