Table 14: Suitability class scores of upland soils of Kogi east for cassava cultivation.

Land qualities/units

 

Climate (c):

S1(90)

Annual rainfall (mm)

S1(95)

Lenght dry season (months)

S1(80)

Mean annual temperature (oC)

S1(90)

Topography (t):

 

Slope (%)

S1(100)

Wetness (w):

 

Drainage

S1(80)

Soil physical properties (s):

S2(70)

Texture

 

Coarse fragments (Vol %) 0-10 cm

S1(90)

Soil Depth (cm)

S1(100)

Fertility (f):

 

CEC (cmolc kg-1)

S2(70)

Base saturation (%)

S2(70)

Organic carbon (g kg-1), 0-15 cm

S3(50)

pH (H20)

S2(60)

Total N (g kg-1)

N1(20)

Available P (mg kg-1)

N1(30)

Exchangeable K (cmolc kg-1)

S3(50)

Exchangeable Ca (cmolc kg-1)

S2(60)

Exchangeable Mg (cmolc kg-1)

S2(60)

Ca = Calcium, Mg = Magnesium, K = Potassium, P = Phosphorus, N = Nitrogen, CEC = Cation Exchange Capacity, S1 = Highly Suitable, S2 = Moderately Suitable, S3 = Marginally Suitable, N1 = Not Currently Suitable, N2 = Permanently not suitable