Water Use Efficiency and Physiological Response of Rice Cultivars under Alternate Wetting and Drying Conditions

Table 2

Analysis of variance for grain yield and water use efficiency (WUE) in the three consecutive seasons at IRRI farm, Philippines.

Year	2009 DS		2009 WS		2010 DS
Source of variation	Yield	WUE	Yield	WUE	Yield	WUE
Water regime (W)	ns	ns	ns	ns	ns	*
Nitrogen (N)	*	ns	**	*	**	*
Variety (V)	*	*	*	ns	*	*
W × N	ns	ns	ns	ns	ns	ns
W × V	ns	ns	ns	ns	ns	ns
N × V	ns	ns	ns	ns	ns	ns
W × N × V	ns	ns	ns	ns	ns	ns

*Significance at the 0.05 level based on analysis of variance.
**Significance at the 0.01 level based on analysis of variance.
ns: denotes nonsignificance based on analysis of variance.