Table 8.

Effects of climate and land use variables at end of the analysis period (2013)

Variable	Lag/memory effect scales (years)	Tau	Two-sided
			P valuea
Field crops (ha)	27	0.12	0.06
Surge flood irrigation (ha)	23	0.11	0.14
Climate water demand (mm)	27	0.06	0.31
Artichoke (ha)	27	0.06	0.35
Rainfall (mm)	27	0.05	0.40
Sprinklers (ha)	21	0.05	0.51
Irrigation water used (mm)	27	0.03	0.62
Sprinklers and furrow (ha)	23	0.03	0.68
Wine grapes (ha)	27	0.03	0.64
Drip (ha)	21	0.02	0.71
Fallow (ha)	23	0.01	0.84
Tail water return systems (ha)	23	−0.02	0.75
Seasonal vegetables (ha)	27	−0.10	0.11
Orchards (ha)	27	−0.11	0.08
Berries (ha)	27	−0.12	0.07

Effects of variable on NO₃ C–Q residuals nearly zero

Italicized values indicate that effects of variable on NO C-Q residuals 3 nearly zero

***0.001, **0.01, *0.05

^aTwo-sided p value ranges: ns > 0.5; 0

^bIncluding cereal grain, hay, and irrigated pasture