Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern Ethiopia

Chemical and Biological Technologies in Agriculture

Table 7 Correlation among the investigated traits of common bean treated different rates of N with and without inoculation in soil having rhizobial population nodulating common bean >1000 g⁻¹ soil

Traits	NN	NDW	SDW	NPP	NSP	SW	TBY	GY	HI
NN
NDW	0.72**
SDW	0.45 ns	−0.23 ns
NPP	0.45 ns	−0.10 ns	0.87***
NSP	0.18 ns	−0.29 ns	0.41 ns	0.27 ns
SW	0.00 ns	−0.07 ns	−0.68*	−0.62*	0.05 ns
TBY	0.56*	−0.27 ns	0.74**	0.79**	0.49 ns	−0.50 ns
GY	0.75**	−0.69*	0.75**	0.61*	0.55*	−0.39 ns	0.77**
HI	0.33 ns	0.34 ns	0.08 ns	−0.15 ns	−0.28 ns	0.06 ns	−0.49 ns	−0.25 ns
PTTN	0.44 ns	−0.02 ns	0.38 ns	−0.53*	0.27 ns	0.03 ns	−0.26 ns	−0.09 ns	0.11 ns

Ns non-significant, NN-Nodule number per plant, NDW nodule dry weight per plant (g plant⁻¹), SDW shoot dry weight (g plant⁻¹), NPP number of pods per plant, NSP number of seeds per pod, 100 SW 100 seed weight (g), TBY total biomass yield (kg ha⁻¹), GY grain yield (kg ha⁻¹), HI harvest index
* Significant at 0.05; ** highly significant at 0.01; *** very highly significant at 0.001