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Decomposing leaf fragment




ID # 151

Decomposing leaf fragment
From the Soil Micromorphology Slide Collection

STEM Standard addressed: ESS2E - Biogeology


Appropriate Grade Level(s)
  • College-level
Materials are best used for
  • Classroom Lectures
  • Laboratory Activities
General Course Areas
  • Soil Microbiology
Description
Horizon sampled: A 1
Depth sampled: 0-5 cm
Physical and chemical data available: See reference
Macromorphological description of horizon: 10 YR 3/2, 4/4 silt loam; strong, fine to medium granular structure
Micromorphological description of horizon: See reference
Description of biological feature: The decomposing leaf fragment is about 4 mm long and elongate. It shows a strong to moderate degree of alteration. The color and internal fabric are variable.

Soil Classification
U.S.: Fine-silty, mixed, mesic Typic Hapludalf

Physiographic position: Upland
Topography and hill slope position: 0-2%, summit
Parent material: Late Weichselian loess
Soil climatic data and/or soil water balance: Mean annual temperature: 10.5 degrees C; mean annual precipitation 634 mm
Vegetation: Deciduous forest

Data for thin section
Preparation of sample: Air dry
Impregnating medium: Polyester resin
Thickness of section: 30 µm
Orientation of section: Vertical

Method
Data for 35-mm slide
Frame length: 3500 µm
Light mode: Plane polarized

References
Thompson, M.L., N. Fedoroff and B. Fournier. 1990. Morphological features related to agriculture and faunal activity in three loess-derived soils in France. Geoderma 46: 329-349.
Source - M. L. Thompson

Soil Science Society of America, 1993. A Reference Slide Collection for Soil Micromorphology. SSSA, Madison, WI.

Peer Review: Yes

Credit this item to: SSSA
Media Date: 1993-01-01
Provided By: (SSSA) Soil Science Society of America

Latitude: 45.6511349
Longitude: 6.377892999999972

Author(s)/Creator(s)

  • * Soil Science Society of America
    SSSA

Submitted By: (SSSA) Soil Science Society of America


Keywords

  • Biological Features
  • A 1 Horizon
  • micromorphology
  • decomposing leaf fragment

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