Horizon designation for organic soils › Forums › SOIL 3600 › Horizon designation for organic soils This topic has 1 reply, 2 voices, and was last updated 2 years, 5 months ago by Mario Tenuta. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 2020-11-23 at 10:38 pm #4404 Victoria DeakinParticipant For organic soils, for instance fibrisols, would the fibric horizon be designated as F or as Of? Which designation is best to use? Thank you, Victoria Deakin 2020-12-18 at 11:13 am #4467 Mario TenutaKeymaster Hi Victoria. Of is the best designation. This way the horizon is not confused with the LFH surface layer of forest or shrub land. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Log in / Register