Difference between revisions of "Chernozem"
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* a [[Has for diagnostic horizon::Mollic horizon (WRB)|mollic horizon]] with a moist chroma of 2 or less if the texture is finer than sandy loam, or less than 3.5 if the texture is sandy loam or coarser, both to a depth of at least 20 cm, or having these chromas directly below any plough layer | * a [[Has for diagnostic horizon::Mollic horizon (WRB)|mollic horizon]] with a moist chroma of 2 or less if the texture is finer than sandy loam, or less than 3.5 if the texture is sandy loam or coarser, both to a depth of at least 20 cm, or having these chromas directly below any plough layer | ||
and : | and : | ||
| − | * concentrations of [[Secondary carbonates (WRB)|secondary carbonates]] starting within 50 cm of the lower limit of the Ah horizon but within 200 cm from the soil surface | + | * concentrations of [[Has for diagnostic property::Secondary carbonates (WRB)|secondary carbonates]] starting within 50 cm of the lower limit of the Ah horizon but within 200 cm from the soil surface |
and : | and : | ||
* no [[Has for diagnostic horizon::Petrocalcic horizon (WRB)|petrocalcic horizon]] between 25 and 100 cm from the soil surface | * no [[Has for diagnostic horizon::Petrocalcic horizon (WRB)|petrocalcic horizon]] between 25 and 100 cm from the soil surface | ||
Latest revision as of 18:15, 28 June 2017
A chernozem (CH) can be defined through :
- a mollic horizon with a moist chroma of 2 or less if the texture is finer than sandy loam, or less than 3.5 if the texture is sandy loam or coarser, both to a depth of at least 20 cm, or having these chromas directly below any plough layer
and :
- concentrations of secondary carbonates starting within 50 cm of the lower limit of the Ah horizon but within 200 cm from the soil surface
and :
- no petrocalcic horizon between 25 and 100 cm from the soil surface
and :
- no secondary gypsum
and :
- no uncoated silt and sand grains on structural ped surfaces
Possible qualifiers
For each RSG, there are some possible prefix and suffix qualifiers :
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Prefix qualifiers |
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Source
- The FAO website
