strong eluviation leaving non pigmented light colored minerals Gray reduction

Strong eluviation leaving non pigmented light colored

This preview shows page 12 - 13 out of 13 pages.

strong eluviation leaving non-pigmented light-colored minerals Gray: reduction of Fe 3+ to Fe 2+ and loss of Fe 2+ , anaerobic conditions with leaching Blue-green: reduction of Fe 3+ to Fe 2+ and retention of Fe 2+ , anaerobic conditions without leaching Redoximorphic features: related to reduction and oxidation of Fe and Mn, indicators of soil wetness and anaerobic conditions Redox depletion: Fe and Mn lost (low chroma) Redox concentration: Fe (high chroma) and Mn accumulated Reduced matrix: Fe reduced and retained Low chroma but increases when exposed to air.
Image of page 12

Subscribe to view the full document.

10/1/2019 13 Pedon Descriptions What characteristics differentiate these two horizons? A3--11 to 19 inches; yellowish brown (10YR 5/4) loam ; dark yellowish brown (10YR 4 /4) moist; strong medium angular blocky structure ; hard, friable, slightly sticky, and slightly plastic; few very fine roots; common very fine and few fine tubular pores; common fine faint very pale brown (10YR 7/3) iron depletions ; moderately acid (pH 5.6); abrupt smooth boundary. 2Bt1--19 to 38 inches; yellowish brown (10YR 5/4) clay ; dark yellowish brown (10YR 3 /4) moist; strong coarse prismatic structure ; extremely hard, firm, moderately sticky and moderately plastic ; few very fine roots; common very fine and few fine tubular pores; many moderately thick clay films ; slightly acid (pH 6.2); clear smooth boundary.
Image of page 13
  • Fall '08
  • Staff

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes