Varietal Trials and Physiological Components Determining Yield Differences among Cowpea Varieties in Semiarid Zone of Nigeria

Table 1

Physicochemical characteristics of the soil at the experimental site.

S/No.*	Soil characteristics	Physicochemical properties
	Chemical analysis
1	pH in H2O	6.71
2	Organic carbon (g/kg)	4.40
3	Organic matter (g/kg)	7.59
4	Total 𝑁 (g/kg)	0.05
5	Available potassium (me/100 g)	0.29
6	Available phosphorus (g/kg)	5.30
	Mechanical analysis (0–15 cm depth)
1	Clay (%)	15.0
2	Sand (%)	70.0
3	Silt (%)	15.0
4	Field texture	Sandy loam

∗S/No.: serial number.