Organic matter and water stable aggregates in soils

  • Tisdall J
  • Oades J
  • 4


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


The water-stability of aggregates in many soils is shown to depend on organic materials. The organic binding agents have been classified into (a) transient. mainly polysaccharides, (b), temporary, roots and fungal hyphae, and (c) persistent. resistant aromatic components associated with polyvalent metal cations, and strongly sorbed polymers. The effectiveness of various binding agents at different stages in the struc- tural organization of aggregates is described and forms the basis of a model which illustrates the architecture of an aggregate. Roots and hyphae stabilize macro- aggregates, defined as > 250 pm diameter; consequently, macroaggregation is con- trolled by soil management (i.e. crop rotations), as management influences the growth of plant roots, and the oxidation of organic carbon. The water-stability of micro- aggregates depends on the persistent organic binding agents and appears to be a characteristic of the soil, independent of management.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Jm Tisdall

  • Jm Oades

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free