Effect of split application of different N rates on productivity and nitrogen use efficiency of bread wheat (Triticum aestivum L.)

Table 2 Mean squares of analysis of variance for year, N fertilizer rate and time of N application, and their interaction

Source	DF	GY	GNUP	TNUP	AE	RE	APE	NHI
Y	1	3,386,971**	789.77**	6813.22**	506.38**	4492.67**	270.07ns	839.08**
Rep (Y)	6	61,018	30.39	120.53	18.85	35.95	51.62	18.28
N	2	12,053,826**	22,875.82**	43,818**	2090.92**	2817.12**	3064.21**	120.10**
T	4	7,906,065**	4969.21**	10,914**	127.93**	1622.94**	287.29**	108.04**
N × T	8	1,127,802**	720.28**	1632.7**	6.12ns	68.09*	11.19ns	26.01*
Y × N	2	233836ns	211.25ns	552.37*	43.59**	142.47*	0.26ns	31.07*
Y × T	4	311205ns	254.56*	59.89ns	4.32ns	24.27ns	167.89**	43.21**
Y × N × T	8	231,387ns	70.27ns	115.94ns	4.89ns	32.98ns	6.73ns	11.28ns
Error	84	130,052	94.9	124.13	3.07	27.57	11.52	9.13

Y year, Rep replication, N N rate, T timing of N application, Df degree of freedom, GY grain yield, GNUP grain nitrogen uptake, TNUP total nitrogen uptake, AE agronomic efficiency, RE recovery efficiency, APE agro-physiological efficiency, NHI nitrogen harvest index
*Significant at the 0.05 probability level; **Significant at P < 0.01 probability level

ISSN: 2048-7010