Table 2.

Analysis of variance (ANOVA) on selected agronomic parameters. Sixty plants for the DS and 24 plants for the WS were considered for plant height, tiller number and panicle number. For the remaining parameters, two replicates pooled from twelve plants each were considered for the WS and five replicates pooled from twelve plants each were considered for the DS. Spikelets/panicle represents the number of spikelets per panicle. The seed set was calculated as follows: seed set (%) = filled grains/(filled+half-filled+unfilled grains) × 100. Harvest index was calculated as percentage of dry weight of filled grains relative to total above-ground biomass. The significance of the influence of genotype (G), HNT-treatment (T), season (S) or the interaction between two influences (GxT or TxS) on differences between HNT and control conditions across all eight cultivars is indicated by asterisks: 0.001 < ***; 0.001 > ** < 0.01; 0.01 > * < 0.05. ns—not significant. Original data for plant height, tiller number, panicle number and all yield components for the WS (2011) and the DS (2014) are available in Table S1.

Parameter	WS	WS	WS	DS	DS	DS	Both Seasons
	G	T	GxT	G	T	GxT	T	S	TxS
Plant Height (cm)	***	ns	**	***	ns.	*	ns	ns	ns
Biomass g/m2	***	*	ns	***	ns	ns	ns	*	ns
Straw (g)	***	ns	*	***	ns	ns	ns	ns	ns
Rachis (g)	***	ns	ns	***	ns	ns	ns	*	ns
Tiller No	***	ns	ns	***	ns	ns	ns	**	ns
Panicle No	***	ns	ns	***	ns	ns	ns	**	ns
Panicle/m2	***	ns	ns	***	ns	ns	ns	**	ns
Spikelet/m2	***	*	ns	***	ns	ns	ns	***	ns
Spikelets/Panicle	***	**	ns	***	ns	ns	ns	***	ns
Seed set (%)	***	ns	ns	***	ns	ns	**	*	ns
Grain yield (g/m2)	***	***	ns	***	ns	ns	ns	**	ns
1000 grain weight (g)	***	***	***	***	***	ns	ns	***	ns
Harvest Index	***	***	ns	***	**	ns	ns	***	ns