Table 1. Chemical composition of surface waters used.

		Date of water collection
Chemical componenta	Units	5-13-15	5-26-15	6-3-15	6-17-15	7-20-15
Na	meq/L	1.43	1.48	1.48	1.48	1.52
Ca	meq/L	6.49	5.99	5.74	6.04	6.54
Mg	meq/L	2.14	2.06	2.14	2.14	2.22
HCO3	meq/L	5.28	4.89	4.69	5.16	5.38
Cl	meq/L	1.80	1.44	1.44	1.52	1.58
Fe	mg/L	0.04	0.04	<0.04	<0.04	<0.04
Mn	mg/L	<0.01	<0.01	<0.01	<0.01	<0.01
P	mg/L	0.07	0.09	0.10	0.10	0.16
K	mg/L	1.4	1.3	1.3	1.3	1.6
NO3	mg/L	<2	<2	<2	<2	2
SO4	mg/L	89	87	88	88	93
B	mg/L	0.05	0.06	0.07	0.06	0.07
Dissolved solids	mg/L	666	616	601	639	674
Adjusted SARb	mg/L	0.96	1.00	0.99	1.00	1.01
TSSc	mg/L	56	288	92	92	40
Turbidity	NTU	0.32	0.69	0.32	0.52	0.40
ECd	dS/m	0.94	0.90	0.89	0.92	0.95
pH		8.1	8.1	8.1	7.9	8.2
Strains assayed		MS2	QB	SP	GA	All environmental

^a Analysis performed by A & L Western Agricultural Laboratories, Inc, Modesto, CA

^b SAR: sodium adsorption ratio

^c TSS: total suspended solids

^d EC: electrical conductivity.