Chernozem
From Wicri Urban Soils
Revision as of 17:44, 7 October 2009 by 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...')
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
Source
- The FAO website
