Sticky pseudogley

In soil science , one speaks of sticky pseudogley when the soil is temporarily wet and the alternation of wet and moist phases merges. Dry phases are rare. The dominant fine and medium pores of the soil can bind adhesive water through capillary forces, whereby an Ah / Sg profile (Ah = topsoil horizon; Sg = adhesive water horizon) can be formed. There are both silty and finely sandy variants.

Soils shaped by backwater are called pseudogleye . In the case of the sticky pseudogley, the pseudo-gleying occurs without a damming horizon in the subsoil. The profile-defining process of water storage in the Sg profile can therefore also occur on steep slopes. Prerequisites are deep soils with a high proportion of silt or fine sand that are naturally poor in coarse pores.

Adhesive pseudogleye can also be found in the mountains when the soil structure has been destroyed by the kick of grazing animals. The animals run parallel to the slope on the same footsteps, which gives the topsoil a coherent structure . In this low-pore, homogeneous soil structure, the retained water is soaked up like a sponge. Such soils are also known as alpine pasture pseudogleye.

In the international soil classification World Reference Base for Soil Resources (WRB), the sticky pseudogleye belong to the stagnosols .

Web links

Processes and reactions: hydromorphing. In: The floor magazine.

literature

• W. Amelung, H.-P. Blume , H. Fleige, R. Horn, E. Kandeler , I. Kögel-Knabner , R. Kretschmar, K. Stahr , B.-M. Wilke: Scheffer / Schachtschabel textbook of soil science. 17th edition. Heidelberg 2018. ISBN 978-3-662-55870-6 .