Chernozem

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		Suffix qualifiers
: : : : : : : : : : : : : : : : : : :		: : : : : : : : : : : : : : : : :

Source

• The FAO website