Table 3.

Results (P-values) of Linear Mixed Model (MIXMOD) analysis on the fixed effects of water addition treatments (water), year, and their interactions on the phenological events and the length of the growing season from 2012–2018.

Phenological events		Water	Year	Water × Year
Leaf unfolding	Onset of leaf unfolding	0.16	<0.01	0.20
	30% of leaves unfolded	0.03	<0.01	0.65
	50% of leaves unfolded	0.08	<0.01	0.73
	End of leaf unfolding	<0.01	<0.01	0.32
Cessation of new branch elongation	30% of new branches ceased elongating	0.07	<0.01	0.24
	50% of new branches ceased elongating	0.85	<0.01	0.80
	90% of new branches ceased elongating	0.01	<0.01	0.53
Leaf coloration	80% of leaves turned yellow	0.02	<0.01	0.41
The length of the growing season		0.01	<0.01	0.53