Table 12: Suitability class scores of upland soils in Kogi East for maize cultivation.
|
Land qualities/units |
|
|
Climate (c): |
|
|
Annual rainfall (mm) |
S1(90) |
|
Mean annual temperature (°C) |
S1(95) |
|
Relative humidity (%) |
S1(80) |
|
Topography (t) |
|
|
Slope (%) |
S2(70) |
|
Wetness (w): |
|
|
Drainage |
S1(80) |
|
Soil physical properties (s): |
|
|
Texture |
S2(70) |
|
Depth (cm) |
S1(100) |
|
Fertility (f): |
|
|
CEC (cmolc kg-1) |
S2(70) |
|
Base saturation (%) |
S2(70) |
|
Organic carbon (g kg-1) |
S3(50) |
|
pH (H20) |
S2(60) |
|
Total N (g kg-1) |
N1(20) |
|
Available P (mg kg-1) |
S3(40) |
|
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, F.D = Flood Duration, G.W.T = Ground water table