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 m (8 revisions imported) |
||
(7 intermediate revisions by one other user not shown) | |||
Line 1: | Line 1: | ||
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"| | ||
+ | |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"| | ||
+ | |- | ||
+ | |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"| | ||
+ | | 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 :
- 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 :
Prefix qualifiers |
| |
Source
- The FAO website