Figure 6 | Scientific Reports

Figure 6

From: Effects of foliar application of humic acid extracts and indole acetic acid on important growth indices of canola (Brassica napus L.)

Figure 6

Comparison of average foliar application of experimental treatments on P (a) and Cu-concentrations (b) at treatment concentrations (levels 1, 2, 3 and 4 for HA, HA-N, HA-AS, HA-NSP and CHA treatments of 0, 200, 400 and 600 mg L−1 and 0, 10–6, 10–5 and 10–4 molar IAA). Different letters in each figure show significant difference at p ≤ 0.05 by Duncan multiple range test. HA, HA extracted from vermicompost without enrichment; HA-N, HA extracted from vermicompost enriched with 1% nitrogen; HA-NSP, HA extracted from vermicompost enriched with 1% nitrogen, 1% sulfur, and 1% phosphorus; HA-AS, HA extracted from vermicompost enriched with Azotobacter chroococcum (21Az) + Pseudomonas fluorescens (Ps 59); CHA, Commercial humic acid; IAA, Indole-3-acetic acid (IAA).

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