Orthic Black Chernozemic Soil 

Ah (0 to 30 cm) Black (10YR 2.5/1 m) silt loam; weak to moderate, medium subangular blocky breaking to moderate to strong, fine granular; friable; abundant, fine random roots; abrupt, wavy boundary; 23 to 34 cm thick 

Bt1 (30 to 87 cm) Brown (10YR 4/3 m) loam; moderate, medium to coarse prismatic; firm; plentiful, fine vertical roots; many, moderately thick, dark grayish brown (10YR 4/2) clay films in many voids and ped surfaces; gradual, wavy boundary; 43 to 61 cm thick 

Bt2 (87 to 113 cm) Dark grayish brown (10YR 4/2 m) loam; moderate, coarse prismatic; very firm; few, very fine vertical roots; many, moderately thin, dark grayish brown (10YR 4/2) clay films in many voids and verical ped surfaces; abrupt wavy boun dary; 22 to 33 cm thick 
CHEMICAL PROPERTIES 
Orthic Black Chernozem -Chemical Properties 
Horizons  pH  OM(%)  CEC Ca2+  Mg2+  Na+ K+ 
(cmolc kg-1) 
Ah 6.8 5.2 40  35.7 4.9 0.1 0.5 
Bt1 6.5 0.3 16.8  11.2 4.2 - 0.5 
Bt2 7.2 0.3 21.8 18.2  6.6 0.1 0.7 
PHYSICAL PROPERTIES 
Orthic Black Chernozem -Physical Properties 
Horizons  Sand  Silt  Clay  BD 
Ah 22 53 25 1.2 
Bt1 44 30 14 1.8 
Bt2 27 38 35 1.7 

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