Table 3. Probability values of the effects of year (Y), nitrogen management strategy (NMS) and their interaction (Y × NMS) on the grain yield, total biomass, harvest index, nutrient uptake and utilization efficiency, net return and benefit to cost ratio.

Growth index	Year (Y)	Nitrogen management strategies (NMS)	Y × NMS
Grain yield	0.59	<0.001	0.98
Total biomass	<0.001	<0.001	0.98
Harvest index	0.003	<0.001	0.93
Grain nitrogen (N) uptake	<0.001	<0.001	0.11
Total N uptake	0.22	<0.001	0.02
Grain phosphorus (P) uptake	0.27	<0.001	0.90
Total P uptake	0.13	<0.001	0.08
Grain potassium (K) uptake	0.56	<0.001	0.99
Total K uptake	<0.001	<0.001	<0.001
N harvest index	<0.001	<0.001	0.04
P harvest index	0.009	<0.001	0.15
K harvest index	0.16	<0.001	<0.001
N agronomic efficiency	0.54	<0.001	0.98
P agronomic efficiency	0.45	<0.001	0.43
K agronomic efficiency	0.45	<0.001	0.43
Apparent N recovery efficiency	<0.001	<0.001	0.26
Apparent P recovery efficiency	0.001	<0.001	0.008
Apparent K recovery efficiency	<0.001	<0.001	<0.001
Net return	0.48	<0.001	0.84
Benefit to cost ratio	0.49	<0.001	0.90