Table 3 Application level [1—HA extracted from VC without enrichment (HA); 2—HA extracted from VC enriched with 1% nitrogen (HA-N); 3—HA extracted from VC enriched with 1% nitrogen, 1% sulfur, and 1% phosphorus (HA-NSP); 4—HA extracted from VC enriched with Azotobacter chroococcum (21Az) + Pseudomonas fluorescens (Ps 59) (HA-AS); 5—Commercial humic acid (CHA); 6—Indole-3-acetic acid (IAA)].

Level 1	Level 2	Level 3	Level 4
No additive of HA	200 mg L⁻¹ HA	400 mg L⁻¹ HA	600 mg L⁻¹ HA
No additive of HA-N	200 mg L⁻¹ HA-N	400 mg L⁻¹ HA-N	600 mg L⁻¹ HA-N
No additive of HA-NSP	200 mg L⁻¹ HA-NSP	400 mg L⁻¹ HA-NSP	600 mg L⁻¹ HA-NSP
No additive of HA-AS	200 mg L⁻¹ HA-AS	400 mg L⁻¹ HA-AS	600 mg L⁻¹ HA-AS
No additive of IAA	10^–6 molar of IAA	10^–5 molar of IAA	10^–4 molar of IAA
No additive of CHA	200 mg L⁻¹ CHA	400 mg L⁻¹ CHA	600 mg L⁻¹ CHA

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