In-situ soil organic matter studies using scanning electron microscopy and low temperature ashing

L. A. Sullivan, A. J. Koppi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The in-situ distribution and morphology of organic materials located on, or near, structural surfaces within some soils is examined on a submicroscopic scale by comparing scanning electron microscope images of the same areas of soil samples before and after low temperature ashing. Electron-translucent organic matter coatings up to 1 2 μm thick, and thinner, electron-opaque organic matter coatings were found on structural surfaces within these soils. Oribatid faecal pellets in one of the soils were found to contain aluminosilicate clay minerals. Fine-clay sized spheres of biogenic opaline silica were found to be contained within the epidermis of a decaying root. These studies show that the combined use of low temperature ashing and scanning electron microscopy will be a valuable technique for in-situ investigations of submicroscopic organic matter within soils.

LanguageEnglish
Pages317-332
Number of pages16
JournalGeoderma
Volume40
Issue number3-4
DOIs
Publication statusPublished - 1987
Externally publishedYes

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soil organic matter
scanning electron microscopy
electron
coatings
soil
coating
temperature
electrons
organic matter
fecal pellet
aluminosilicate
clay minerals
scanning electron microscopes
silica
pellets
clay mineral
soil sampling
clay
in situ
methodology

Cite this

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abstract = "The in-situ distribution and morphology of organic materials located on, or near, structural surfaces within some soils is examined on a submicroscopic scale by comparing scanning electron microscope images of the same areas of soil samples before and after low temperature ashing. Electron-translucent organic matter coatings up to 1 2 μm thick, and thinner, electron-opaque organic matter coatings were found on structural surfaces within these soils. Oribatid faecal pellets in one of the soils were found to contain aluminosilicate clay minerals. Fine-clay sized spheres of biogenic opaline silica were found to be contained within the epidermis of a decaying root. These studies show that the combined use of low temperature ashing and scanning electron microscopy will be a valuable technique for in-situ investigations of submicroscopic organic matter within soils.",
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In-situ soil organic matter studies using scanning electron microscopy and low temperature ashing. / Sullivan, L. A.; Koppi, A. J.

In: Geoderma, Vol. 40, No. 3-4, 1987, p. 317-332.

Research output: Contribution to journalArticle

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