Difference between revisions of "Chernozem"

From Wicri Urban Soils
imported>Thierry Daunois
(Created page with '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 s...')
 
imported>Jacques Ducloy
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A '''chernozem''' (CH) can be defined through :
 
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
+
* 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 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 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
 
and :
 
and :
 
* no secondary gypsum
 
* no secondary gypsum
 
and :
 
and :
 
* no uncoated silt and sand grains on structural ped surfaces
 
* no uncoated silt and sand grains on structural ped surfaces
 +
 +
==Possible qualifiers==
 +
 +
For each RSG, there are some possible prefix and suffix qualifiers :
 +
 +
{|width="60%" cellspacing="0" cellpadding="0" style="margin-top:0.6em"
 +
|-
 +
|width="50%" valign="middle" style="border:1px solid #CCF7CC;background:#EEFFEE;padding:7px;text-align:center"|
 +
<big>'''Prefix qualifiers'''</big><br/>
 +
|style="padding:4px;font-size:1px"|&nbsp;
 +
|width="50%" valign="middle" style="border:1px solid #DDDDF7;background:#F7F7FF;padding:7px"|
 +
<center><big>'''Suffix qualifiers'''</big></center>
 +
|-
 +
|style="font-size:0.6em;line-height:0.6em"|&nbsp;
 +
|-
 +
|valign="top" class="cadregris" style="margin-bottom:0.6em;border:1px solid #AAAAAA;background-color:#FCFCFC;padding:7px"|
 +
* [[Has for prefix qualifier::Voronic (WRB qualifier)|Voronic]]
 +
* [[Has for prefix qualifier::Vermic (WRB qualifier)|Vermic]]
 +
* [[Has for prefix qualifier::Technic (WRB qualifier)|Technic]]
 +
* [[Has for prefix qualifier::Leptic (WRB qualifier)|Leptic]]
 +
* [[Has for prefix qualifier::Vertic (WRB qualifier)|Vertic]]
 +
* [[Has for prefix qualifier::Endofluvic (WRB qualifier)|Endofluvic]]
 +
* [[Has for prefix qualifier::Endosalic (WRB qualifier)|Endosalic]]
 +
* [[Has for prefix qualifier::Gleyic (WRB qualifier)|Gleyic]]
 +
* [[Has for prefix qualifier::Vitric (WRB qualifier)|Vitric]]
 +
* [[Has for prefix qualifier::Andic (WRB qualifier)|Andic]]
 +
* [[Has for prefix qualifier::Stagnic (WRB qualifier)|Stagnic]]
 +
* [[Has for prefix qualifier::Petrogypsic (WRB qualifier)|Petrogypsic]]
 +
* [[Has for prefix qualifier::Gypsic (WRB qualifier)|Gypsic]]
 +
* [[Has for prefix qualifier::Petroduric (WRB qualifier)|Petroduric]]
 +
* [[Has for prefix qualifier::Duric (WRB qualifier)|Duric]]
 +
* [[Has for prefix qualifier::Petrocalcic (WRB qualifier)|Petrocalcic]]
 +
* [[Has for prefix qualifier::Calcic (WRB qualifier)|Calcic]]
 +
* [[Has for prefix qualifier::Luvic (WRB qualifier)|Luvic]]
 +
* [[Has for prefix qualifier::Haplic (WRB qualifier)|Haplic]]
 +
 +
<!-- ============================================= -->
 +
|style="font-size:0.6em;line-height:0.6em"|&nbsp;
 +
| valign="top" class="cadregris" style="margin-bottom:0.6em;border:1px solid #AAAAAA;background-color:#FCFCFC;padding:7px"|
 +
* [[Has for suffix qualifier::Anthric (WRB qualifier)|Anthric]]
 +
* [[Has for suffix qualifier::Glossic (WRB qualifier)|Glossic]]
 +
* [[Has for suffix qualifier::Tephric (WRB qualifier)|Tephric]]
 +
* [[Has for suffix qualifier::Sodic (WRB qualifier)|Sodic]]
 +
* [[Has for suffix qualifier::Pachic (WRB qualifier)|Pachic]]
 +
* [[Has for suffix qualifier::Oxyaquic (WRB qualifier)|Oxyaquic]]
 +
* [[Has for suffix qualifier::Greyic (WRB qualifier)|Greyic]]
 +
* [[Has for suffix qualifier::Densic (WRB qualifier)|Densic]]
 +
* [[Has for suffix qualifier::Skeletic (WRB qualifier)|Skeletic]]
 +
* [[Has for suffix qualifier::Arenic (WRB qualifier)|Arenic]]
 +
* [[Has for suffix qualifier::Siltic (WRB qualifier)|Siltic]]
 +
* [[Has for suffix qualifier::Clayic (WRB qualifier)|Clayic]]
 +
* [[Has for suffix qualifier::Novic (WRB qualifier)|Novic]]
 +
|}
  
 
==Source==
 
==Source==

Latest revision as of 19:15, 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 :

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 :

Prefix qualifiers

  
Suffix qualifiers
 
 

Source

fr:Chernozem

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