Soil value

Soil value (German: Bodenwertzahl) or BWZ is a comparative assessment of soil quality used in Germany. It is determined from soil sampling data and ranges from 0 (very low) to 100 (very high).

According to the Geological Service of the state of North Rhine-Westphalia, the soil value of arable land is based on a field assessment framework which combines an assessment of soil type, soil condition (soil development) and the parent material of which the soil is composed. The result, the soil value, expresses the relative net income that, under normal and proper management, is determined only by the profitability of the soil. Additions or deductions in this value to take account of variations in yield due to terrain and climate (e.g. average annual temperature) give the field value (Ackerzahl).[1]

## Contents

* 1 Range of values
* 2 Origins
* 3 See also
* 4 References
* 5 External links

## Range of values

The following colour scheme is used referring to the soil quality for certain ranges of values:[1]

Soil quality | Range of values | Color

|
|

Very poor | 0–18 | brown
Poor | 18–35 | red
Medium | 35–55 | orange
High | 55–75 | yellow
Very High | 75–100 | green

The values exhibited by different types of soil are:[2]

Type of soil | Range of values

|

Sand | 0–11
Sandy loam | 11–30
Heavy to clayey loam | 31–50
Loam, partly with loess covering | 51–70
Loam with loess covering | 71–90
Loess | 91–100

## Origins

As a yardstick for soil quality, a "Reich Standard Farm" was set up during the Third Reich in the parish of Eickendorf in the Magdeburger Börde, an exceptionally rich arable region. During the Reich Soil Assessment (Reichsbodenschätzung) following the Soil Assessment Act in 1934 a soil value of 100 was established in the leading Reich farm of Haberhauffe/Jäger. It was the basis of comparison for the tax rating of farms in Germany. Since this farm was no longer available for comparisons within West Germany after the Second World War, a farm in Machtsum near Harsum in the Hildesheim Börde was designated as the Federal Standard Farm. During later measurements, an even higher value of BWZ – 102.8 – was measured in Mölme, about 20 km east of Hildesheim within the municipality of Söhlde. It is the highest value ever recorded in Germany.

Another measure, the field value (Ackerzahl), is derived from the soil value, taking account of other factors such as climate and location e.g. along the edge of woodland.

## See also

* Soil classification
* Soil quality
* Soil science
* Soil Use Efficiency
* Crop yield

## References

1. ↑ 1.0 1.1 Wertzahlen der Bodenschätzung at www.gd.nrw.de. Accessed on 2 Sep 2012.
2. ↑ Antragsunterlagen Raumordnungsverfahren für den Neubau einer MonoDeponie, p. 70 , Landkreis Wesermarsch, 5 November 2014, PDF file, 55,5 MB, p. 79

## External links

* Wertzahlen der Bodenschätzung at www.gd.nrw.de. Accessed on 2 Sep 2012.
* Eickendorf

* v
* t
* e

Topics in soil science

Main fields|

* Pedology
* Edaphology
* Soil biology
* Soil microbiology
* Soil zoology
* Soil ecology
* Soil physics
* Soil mechanics
* Soil chemistry
* Environmental soil science
* Agricultural soil science

Soil topics|

* Soil
* Pedosphere
* Soil morphology
* Pedodiversity
* Pedogenesis
* Soil erosion
* Soil contamination
* Soil retrogression and degradation
* Soil compaction
* Soil compaction (agriculture)
* Soil salinity
* Alkali soil
* Soil pH
* Soil acidification
* Soil health
* Soil life
* Soil biodiversity
* Soil quality
* Soil value
* Soil fertility
* Soil resilience
* Soil color
* Soil texture
* Soil structure
* Pore space in soil
* Pore water pressure
* Soil crust
* Soil horizon
* Soil biomantle
* Soil carbon
* Soil gas
* Soil respiration
* Soil organic matter
* Soil moisture
* Soil water (retention)

Soil type|

* v
* t
* e

Soil classification

USDA soil taxonomy|

* Alfisols
* Andisols
* Aridisols
* Entisols
* Gelisols
* Histosols
* Inceptisols
* Mollisols
* Oxisols
* Spodosols
* Ultisols
* Vertisols

World Reference Base
for Soil Resources (1998–)|

* Acrisols
* Alisols
* Andosols
* Anthrosols
* Arenosols
* Calcisols
* Cambisols
* Chernozem
* Cryosols
* Durisols
* Ferralsols
* Fluvisols
* Gleysols
* Gypsisols
* Histosol
* Kastanozems
* Leptosols
* Lixisols
* Luvisols
* Nitisols
* Phaeozems
* Planosols
* Plinthosols
* Podzols
* Regosols
* Retisols
* Solonchaks
* Solonetz
* Stagnosol
* Technosols
* Umbrisols
* Vertisols

Other systems|

* FAO soil classification (1974–98)
* Unified Soil Classification System
* AASHTO Soil Classification System
* Référentiel pédologique (French classification system)
* Canadian system of soil classification
* Australian Soil Classification
* Polish Soil Classification
* 1938 USDA soil taxonomy
* List of U.S. state soils
* List of vineyard soil types

Non-systematic soil types|

* Sand
* Silt
* Clay
* Loam
* Topsoil
* Subsoil
* Soil crust
* Claypan
* Hardpan
* Gypcrust
* Caliche
* Parent material
* Pedosphere
* Laimosphere
* Rhizosphere
* Bulk soil
* Alkali soil
* Bay mud
* Blue goo
* Brickearth
* Brown earth
* Calcareous grassland
* Dark earth
* Dry quicksand
* Eluvium
* Expansive clay
* Fill dirt
* Fuller's earth
* Hydrophobic soil
* Loess
* Lunar soil
* Martian soil
* Mud
* Muskeg
* Paleosol
* Peat
* Pedalfer
* Pedocal
* Podzol
* Prime farmland
* Serpentine soil
* Spodic soil
* Subaqueous soil
* Terra preta
* Terra rossa (soil)
* Tropical peat
* Yedoma

Types of soil

Applications|

* Soil conservation
* Soil management
* Soil guideline value
* Soil survey
* Soil test
* Soil governance
* Soil value
* Soil salinity control
* Erosion control
* Soil policy (Victoria, Australia)
* Agroecology
* Liming (soil)

Related fields|

* Geology
* Geochemistry
* Petrology
* Geomorphology
* Geotechnical engineering
* Hydrology
* Hydrogeology
* Biogeography
* Earth materials
* Archaeology
* Agricultural science
* Agrology

Societies, Initiatives|

* Australian Society of Soil Science Incorporated
* Canadian Society of Soil Science
* Central Soil Salinity Research Institute (India)
* German Soil Science Society
* Indian Institute of Soil Science
* International Union of Soil Sciences
* International Year of Soil
* National Society of Consulting Soil Scientists (USA)
* OPAL Soil Centre (UK)
* Soil Science Society of Poland
* Soil and Water Conservation Society (USA)
* Soil Science Society of America
* World Congress of Soil Science

Scientific journals|

* Acta Agriculturae Scandinavica B
* Journal of Soil and Water Conservation
* Plant and Soil
* Pochvovedenie
* Soil Research
* Soil Science Society of America Journal

See also|

* Land use
* Land conversion
* Land management
* Vegetation
* Infiltration (hydrology)
* Groundwater
* Crust (geology)
* Impervious surface/Surface runoff

* Wikipedia:WikiProject Soil
* Category soil
* Category soil science
* Index of soil-related articles
* List of soil scientists

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