Rhizosheaths -a neglected phenomenon in Australian agriculture

Rhizosheaths are formed as a result of a proliferation of root hairs that enmesh sand grains to form cylinders on non-branching roots, usually of xerophytic plant species. Their occurrence in eastern Australia on the roots of the mesophytic grasses, Secale montanum and Triticum aestivum, is reported and their probable importance discussed. A technique for separating soil particles from the root hairs is described which should facilitate the study of these structures in other plants.