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 5 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 <100 g⁻¹ soil

Traits	NN	NDW	SDW	NPP	NSP	100 SW	TBY	GY	HI
NN
NDW	0.93***
SDW	−0.19 ns	−0.28 ns
NPP	−0.15 ns	−0.39 ns	0.44 ns
NSP	0.11 ns	−0.14 ns	0.59*	0.66*
100 SW	−0.08 ns	−0.21 ns	0.67*	0.78**	0.74**
TBY	−0.68*	−0.76**	0.69*	0.50*	0.56*	0.65*
GY	−0.56*	−0.70*	0.52*	0.46 ns	0.59*	0.58*	0.91***
HI	0.13 ns	−0.04 ns	0.08 ns	−0.05 ns	0.30 ns	0.08 ns	0.09 ns	−0.00 ns
PTTN	0.13 ns	−0.18 ns	0.23 ns	0.66*	0.72*	0.56*	0.36 ns	0.38 ns	0.52*

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