FANR 3060 1st Edition Lecture 9Outline of Last LectureI. Diagnostic Horizons (con’t)II. Soil OrdersOutline of Current LectureI. Soil Orders (con’t)Chapter 3I. Soil Orders (con’t)a. Oxisolsi. Ochric/umbric Aii. Deeply, highly weathered oxicBthoriz1. Very thick2. Very high in clay and ironiii. Formed on mafic rocks that weather readily 1. High clay and Fe producediv. None in the continental USv. Takes a long time with intense weathering to formb. Histisolsi. Peats and mucks of swampy areas1. Peat: fibrous material, partially decomposed (coal)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.2. Muck: fine, highly decomposed ii. Histic A horiz1. Composed of decomposed plant remainsiii. C horiz usually underneathiv. Topography plays a huge role1. Need a special relief to achieve this type of soilv. Found in the Flatwoodsc. Figure 3.4i. Andisols1. Pacific NW2. Volcanoesii. Mollisols1. Midwest2. Formed on sedimentary rock, low rainfalla. High in bases bc they haven’t been leached out yet3. Alfisolsa. Michigan/Great Lakes areab. Formed on glacial tillc. Hardwoodsd. High in bases4. Spodosolsa. Great Lakes and Northeastb. Formed on glacial tillc. Sandy with conifers5. Inceptisolsa. Northeastb. Topography plays big rolei. Appalachian Mtns = steepii. Lots of erosion6. Histisolsa. Floridab. Swampsc. Have a lot of live oaksi. Tanninsii. Black waterd. Soil Orders in Athens-Clarke Countyi. Entisolii. Inceptisoliii. Ultisoliv.
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