{"id":337,"date":"2021-11-11T18:04:06","date_gmt":"2021-11-11T17:04:06","guid":{"rendered":"https:\/\/www.humus-form.eu\/?page_id=337"},"modified":"2023-08-24T16:30:37","modified_gmt":"2023-08-24T14:30:37","slug":"definition-oh-horizonte","status":"publish","type":"page","link":"https:\/\/www.humus-form.eu\/?page_id=337","title":{"rendered":"Oh-horizons"},"content":{"rendered":"

Oxh
\n<\/strong>Oh modified horizon with clearly recognisable droppings of soil fauna, temporarily very high biological activity, thickness \u2265 5 cm.
\n[x from biological mix<\/strong>ed]<\/p>\n

    \n
  1. organic carbon content \u2265 15 mass % and<\/li>\n
  2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
  3. proportion of organic fine material \u2265 70 vol.%loosely packed and<\/li>\n
  4. material predominantly to exclusively with a fine granular structure<\/li>\n<\/ol>\n
    \n
    \"\"<\/a>

    Oxh horizont with a fine granular structure,
    diagnostic horizon of\u00a0 Pechmoder,\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0 \u00a9 Gerhard Milbert<\/p><\/div>\n

     <\/p><\/blockquote>\n

    Oxh horizont with a fine granular structure,
    \ndiagnostic horizon of\u00a0     Pechmoder<\/a>, \u00a9 Gerhard Milbert<\/p>\n

    Obh
    \n<\/strong>Oh modified horizon, with signs of medium biological activity, recognisable excrements of soil fauna, partly rounded, Obh horizon hard to separate from the mineral soil.
    \n[b from „b<\/strong>r\u00f6ckelig“ (german for friable)]<\/p>\n

      \n
    1. organic carbon content \u2265 15 mass % and<\/li>\n
    2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
    3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
    4. loosely packed and<\/li>\n
    5. easily breaking to subangular blocky aggregates or powdery material of organic fine matter<\/li>\n<\/ol>\n

      (-> Moder<\/em>)<\/a><\/p>\n

      \n
      \"\"<\/a>

      Obh horizon, subangular blocky structure and powdery material of organic fine matter, diagnostic horizon of Typical Moder, \u00a9 Alexander Konopatzki<\/p><\/div><\/blockquote>\n

      Owbh
      \n<\/strong>Obh modified horizon, temporarily influenced by stagnic water or groundwater. Vegetation indicates wetness in the A horizon
      \n[w from w<\/strong>ater influenced]<\/p>\n

        \n
      1. organic carbon content \u2265 15 mass % and<\/li>\n
      2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
      3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
      4. temporarily anaerobic conditions and<\/li>\n
      5. when moist, smeary consistency of the black organic fine matter and<\/li>\n
      6. above recently water influenced hydromorphic A or H horizon<\/li>\n<\/ol>\n

        (->Moist Moder<\/em>)<\/a><\/p>\n

        Oih
        \n<\/strong>Oh modified horizon, very thin, film-forming horizon at mineral soil surface or thin patches of Oh material here and there.
        \n[i from fi<\/strong>lm-like]<\/p>\n

          \n
        1. organic carbon content \u2265 15 mass % and<\/li>\n
        2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
        3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
        4. film-forming, thickness < 5 mm or<\/li>\n
        5. thickness \u2265\u00a05\u00a0mm and patchy (in pocket-like depressions of the mineral soil surface)<\/li>\n<\/ol>\n

          (-> Mull-like Moder<\/em>)<\/a><\/p>\n

          \n
          \"\"<\/a>

          Oih horizon, needle material: Norway spruce (Picea abies) humus form: Mull-like Moder, Cambisol with high base saturation,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a9 Gerhard Milbert<\/p><\/div>\n

          Oih horizon, needle material:<\/em> Norway spruce<\/em> (Picea abies<\/em>) humus form:<\/em> Mull-like Moder, Cambisol with<\/em>
          \nhigh base saturation, \u00a9 Gerhard Milbert<\/em><\/p>\n<\/blockquote>\n

          Ovh
          \n<\/strong>Oh modified horizon, contact with solid rock or coarse material, pH value and base saturation on limestone higher than in the overlaying Oh horizon, contains particles of limestone, high biological activity, very low thickness 1 \u2013 3 cm.
          \n[v from german = vererdet, meaning an increased mineral content]<\/p>\n

            \n
          1. organic carbon content \u2265 15 mass % and<\/li>\n
          2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
          3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
          4. material is friable under moist conditions, biological active and<\/li>\n
          5. deep black-coloured on limestone, black or deep brown-coloured on lime free material<\/li>\n<\/ol>\n

            (-> Tangel<\/em>)<\/a><\/p>\n

            Okh
            \n<\/strong>Oh transition horizon (Obh-Osh), strongly to extremely acidic, biologically inactive organic fine matter, originated from heather or coniferous litter. Okh horizon easy to separate from the mineral soil, compact, breakable into pieces with blunt or rounded edges, mostly strong to very strong rooting (Figure 19).
            \n[k from german = kompakt; engl. compact]<\/p>\n

              \n
            1. organic carbon content \u2265 15 mass % and<\/li>\n
            2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
            3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
            4. compact packing and<\/li>\n
            5. the material is breaking in coarse, incompletely separate aggregates with blund or rounded edges and<\/li>\n
            6. aggregates do not fit together without gaps after breaking<\/li>\n<\/ol>\n

              (-> Moder-like Mor<\/em>)<\/a><\/p>\n

              \n
              \"\"<\/a>

              Okh horizon, breaking in coarse, incompletely separate aggregates with blund or rounded edges, aggregates do not fit together without gaps after breaking,
              \u00a9 Gerhard Milbert<\/p><\/div><\/blockquote>\n

              Osh
              \n<\/strong>Oh modified horizon, strongly to extremely acidic, consisting of biologically inactive organic fine matter, originated from heather or coniferous litter. The separability between the sharp-edged crushable Osh horizon and the mineral soil is usually very good (Figure 21).
              \n[s from s<\/strong>harp edged]<\/p>\n

                \n
              1. compact packing and<\/li>\n
              2. material breaks into aggregates with sharp division surfaces that fit together again without gaps (\u00e0 Mor<\/em>)<\/li>\n
              3. organic carbon content \u2265 15 mass % and<\/li>\n
              4. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
              5. proportion of organic fine material \u2265 70 vol.%<\/li>\n
              6. compact packing and<\/li>\n
              7. material breaks into aggregates with sharp division surfaces that fit together again without gaps (-> Mor<\/em>)<\/a><\/li>\n<\/ol>\n
                \n
                \"\"<\/a>

                Osh horizon, material compact packing and breaking into aggregates with sharp division surfaces that fit together again without gaps, \u00a9 Ecke von Zezschwitz \u2020<\/p><\/div><\/blockquote>\n

                Owsh
                \n<\/strong>Osh modified horizon, temporarily influenced by stagnic water or groundwater. Vegetation indicates wetness in the A horizon.
                \n[w from w<\/strong>ater influenced]<\/p>\n

                  \n
                1. organic carbon content \u2265 15 mass % and<\/li>\n
                2. developed under aeromorphic to aero-hydromorphic conditions<\/li>\n
                3. proportion of organic fine material \u2265 70 vol.%<\/li>\n
                4. compact packing and<\/li>\n
                5. material breaks into aggregates with sharp division surfaces that fit together again without gaps<\/li>\n
                6. temporary anaerobic conditions and<\/li>\n
                7. when moist, smeary consistency of the black organic fine matter and<\/li>\n
                8. above hydromorphic A horizon \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (-> Moist Mor<\/em>)<\/a><\/li>\n<\/ol>\n
                  \n
                  \"\"<\/a>

                  Refrangible hydromorphic Osh-horizon, Moist Mor (Photo: Jan Evers)<\/p><\/div><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

                  Oxh Oh modified horizon with clearly recognisable droppings of soil fauna, temporarily very high biological activity, thickness \u2265 5 cm. [x from biological mixed] organic carbon content \u2265 15 mass % and developed under aeromorphic to aero-hydromorphic conditions proportion of … Weiterlesen →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":148,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"yoast_head":"\nOh-horizons - Humus Form<\/title>\n<meta name=\"description\" content=\"Oh, Oih, Obh, Oxh, Ovh, Owbh, Okh, Osh, Streu stark humifiziert, Anteil organischer Feinsubstanz > 70 Volumen%, Lagerungsform von pulvrig bis scharfkabtig brechbar\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.humus-form.eu\/?page_id=337\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oh-horizons - Humus Form\" \/>\n<meta property=\"og:description\" content=\"Oh, Oih, Obh, Oxh, Ovh, Owbh, Okh, Osh, Streu stark humifiziert, Anteil organischer Feinsubstanz > 70 Volumen%, Lagerungsform von pulvrig bis scharfkabtig brechbar\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.humus-form.eu\/?page_id=337\" \/>\n<meta property=\"og:site_name\" content=\"Humus Form\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-24T14:30:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.humus-form.eu\/wp-content\/uploads\/2023\/08\/Pechmoder-04-300x290.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.humus-form.eu\/?page_id=337\",\"url\":\"https:\/\/www.humus-form.eu\/?page_id=337\",\"name\":\"Oh-horizons - 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