Table 3.

Macronutrient solution composition of several nutrient solutions and their dilutions with corresponding electronic conductivity (EC)

	EC (dS m−1)	Macronutrients (mmol L−1)
		NO3	NH4	P	K	Ca	Mg	SO4	Na	Cl	NH4:NO3	K:Ca
Full nutrient solution
Hermans et al. [25]	0.7	2.00	0.00	0.25	2.01	1.00	1.00	0.00	1.88	0.00	0.00	2.01
Murashige and Skoog [23]	5.9	39.40	20.60	1.25	20.06	3.00	1.50	1.73	0.40	6.00	0.52	6.69
Murashige and Skoog [23] ($1/4\times$)	1.6	9.85	5.15	0.31	5.03	0.75	0.38	0.43	0.10	1.50	0.52	6.71
Conn et al. [6]	2.0	9.00	2.00	0.60	5.60	2.10	2.00	2.02	1.60	3.70	0.22	2.67
Hoagland and Arnon [22]	2.0	14.00	1.00	1.00	6.00	4.00	2.00	2.00	0.00	0.02	0.07	1.50
Tocquin et al. [24]	1.1	7.15	0.16	0.13	5.10	1.01	0.50	0.52	0.03	0.00	0.02	5.05
HYPONeX Japan Co. Ltd.	1.4	4.40	1.70	1.30	4.10	2.00	1.20	3.30	0.10	0.00	0.39	2.05
Somerville and Ogren [21] used by Arteca and Arteca [9]	1.6	9.00	0.00	2.50	7.50	2.00	2.00	2.02	0.03	0.00	0.00	3.75
Normalized to EC 1.1 dS m−1
Conn et al. [6]	1.1	4.68	1.04	0.31	2.91	1.09	1.04	0.83	1.05	1.92	0.22	2.67
Hoagland and Arnon [22]	1.1	7.00	0.50	0.50	3.00	2.00	1.00	1.00	0.00	0.02	0.07	1.50
Hermans et al. [25]	1.1	3.22	0.00	0.40	3.23	1.61	1.61	3.03	0.00	0.00	0.00	2.01
Murashige and Skoog [23]	1.1	6.45	3.37	0.20	3.28	0.49	0.25	0.28	0.07	0.98	0.52	6.69
Dilutions
Hoagland and Arnon [22]	0.1	0.57	0.04	0.04	0.24	0.16	0.08	0.08	0.00	0.02	0.07	1.50
Hoagland and Arnon [22]	0.3	1.76	0.13	0.13	0.75	0.50	0.25	0.25	0.00	0.02	0.07	1.50
Hoagland and Arnon [22]	0.5	3.00	0.21	0.21	1.29	0.86	0.43	0.43	0.00	0.02	0.07	1.50
Hoagland and Arnon [22]	0.7	4.27	0.31	0.31	1.83	1.22	0.61	0.61	0.00	0.02	0.07	1.50
Tocquin et al. [24]	0.7	4.69	0.10	0.09	3.34	0.66	0.33	0.34	0.03	0.00	0.02	5.06
Hoagland and Arnon [22]	1.0	6.24	0.45	0.45	2.68	1.78	0.89	0.89	0.00	0.02	0.07	1.51
Hoagland and Arnon [22]	1.3	7.93	0.57	0.57	3.39	2.27	1.13	1.13	0.00	0.02	0.07	1.49
Hoagland and Arnon [22]	3.0	21.00	1.50	1.50	9.00	6.00	3.00	3.00	0.00	0.02	0.07	1.50
Hoagland and Arnon [22]	3.8	28.00	2.00	2.00	12.00	8.00	4.00	4.00	0.00	0.02	0.07	1.50
Phosphate experiment
Hoagland and Arnon [22]	1.4	7.00	0.50	0.50	5.00	2.00	1.00	2.00	0.00	0.02	0.07	2.50
Hoagland and Arnon [22]	1.3	7.00	0.50	2.50	5.00	2.00	1.00	1.00	0.00	0.02	0.07	2.50
Somerville and Ogren [21]	1.7	9.00	0.00	2.50	7.50	2.00	2.00	2.00	0.17	0.01	0.00	3.75
Somerville and Ogren [21]	1.8	9.00	0.00	0.63	7.50	2.00	2.00	2.94	0.17	0.01	0.00	3.75
Somerville and Ogren [21]	0.7	2.25	0.00	2.50	3.75	0.50	0.50	0.50	0.17	0.01	0.00	7.50
Somerville and Ogren [21]	0.7	2.25	0.00	0.63	3.75	0.50	0.50	1.44	0.17	0.01	0.00	7.50

Salt recipes are provided in Additional file 13