Response of Two Maize (Zea mays L.) Varieties to Times of NPK (15-15-15) Fertilizer Application

Table 2

Initial soil characteristics at a depth of 0–20 cm from the experimental plot prior to sowing of maize seeds.

Soil properties	Values
Chemical properties
pH (1 : 2.5, H2O)	5.99
Available P (mg/kg)	33.61
Total N (%)	0.14
Exchangeable bases (cmol/kg)
K^+	0.795
Ca^2+	2.2
Mg^2+	1.2
Na^+	0.078
Exchangeable acidity (cmol/kg)
Al^3+	0.418
H^+	0.217
Soil organic carbon (%)	0.998
Soil organic matter (%)	1.72
Physical properties	Soil
Sand (%)	48.08
Clay (%)	16.04
Silt (%)	35.88
Textural class	Loam