Response of soybean to Rhizobial inoculation and starter N fertilizer on Nitisols of Assosa and Begi areas, Western Ethiopia

Environmental Systems Research

Table 2 Combined ANOVA for Effect of starter N and rhizobial inoculation on nodulation, growth and yield of soybean at Assosa and Begi in 2016/17 and 2017/2018 cropping seasons

Source of variation	NN (No/plt.)	NDW (g/plt.)	SDW (g/plt.)	PPP	SPP	SY (kg/ha)
Loc	12.25^NS	0.03^NS	0.44^NS	68.75^NS	1.21^NS	10.23^NS
Year	0.21 ^NS	0.61^NS	37.1^***	64.1^***	23.89^**	314.3^***
Loc × Year	0.66^NS	0.36^NS	29.1^***	0.03^NS	46.4^***	80.36^***
Inoculation (I)	18.02^NS	65.6^NS	30880^**	0.64^NS	40.1^NS	81.45^NS
Loc × I	2.48^NS	0.73^NS	5.70^NS	0.21^NS	289.0^*	41.82^NS
Year × I	2.81^NS	0.43^***	0.00^NS	5.73^*	0.05^NS	3.95^NS
Loc x Year × I	0.03^NS	3.81^NS	1.54^NS	3.21^NS	0.001^NS	1.65^NS
Nitrogen rate (N)	0.44^NS	2.79^NS	2.83^NS	1.42^NS	0.73^NS	1.94^NS
Loc × N	0.17^NS	3.90^NS	0.53^NS	0.64^NS	1.77^NS	0.17^NS
Year × N	3.30^**	0.29^NS	2.08^NS	0.82^**	1.76^NS	4.15^***
Loc × Year × N	2.23^NS	0.52^NS	0.83^NS	1.27^NS	0.27^NS	24.3^***
I × N	0.94^NS	0.75^NS	5.73^*	5.25^*	0.56^NS	4.91^*
Loc × I × N	1.89^NS	1.83^NS	0.27^NS	0.74^NS	2.25^NS	2.55^NS
Year × I × N	4.69^***	0.82^NS	1.63^NS	3.79^**	6.45^***	1.05^NS
Loc × Year × R × V	1.70^NS	1.32^NS	2.31^NS	0.20^NS	1.26^NS	1.69^NS
CV (%)	49.42	59.52	20.21	18.76	6.18	9.50

NN, nodule number; NDW, nodule dry weight; SDW, shoot dry weight; PPP, pod per plant; SPP, seed per pod; SY, seed yield, NS, non-significant (p > 0.05)
*significant (p < 0.05), **highly significant (p < 0.001), ***extremly significant (p < 0.0001)