Thoroughness
The depth is a term from strength theory and soil mechanics and is considered a key property of the soil .
Types of thoroughness
There are two types of thoroughness:
- The absolute soil depth refers to the power of the freely for plant root-permeable space, so the depth of the loose material over solid ground layers. The depth determines the storage volume for water, nutrients and also the filter volume for pollutants. It is the flow path for vertical soil processes. According to the Soil Science Working Group, a distinction is made between deep (up to over 1 m), medium (up to approx. 60 cm) and shallow (up to approx. 30 cm) soils.
- The physiological depth is the decisive factor because it describes the space that can actually be penetrated by roots . It is differentiated from absolute thoroughness, because it takes possible storage layers into account. Reservoir layers can e.g. B. formed by an increased water table , coarse rock rubble or by compacted soil horizons. If damming layers limit the rootable sediment , one speaks of the physiological depth, which is also divided into 6 classes from Wp1 = very shallow to Wp6 = extremely deep.
Classification of physiological thoroughness
- Wp1 = very flat = 0.15 m
- Wp2 = flat = 0.15-0.30 m
- Wp3 = medium = 0.30-0.70 m
- Wp4 = deep = 0.70-1.20 m
- Wp5 = very deep = 1.20–2.00 m
- Wp6 = extremely deep => 2.00 m
Web links
- Hans-Peter Blume , Rainer Horn, Ellen Kandeler , Ingrid Kögel-Knabner, Ruben Kretzschmar, Karl Stahr , Berndt-Michael Wilke: Textbook of Soil Science , Springer, 2010, ISBN 382741444X .
Individual evidence
- ↑ Archived copy ( memento of the original dated February 11, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
