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Bottles to trees: Plastic beverage bottles as an alternative nursery growing container for reforestation in developing countries

Fig 6

Effects of root spiraling prevention method by opacity treatment combinations on algae growth on inner container walls.

The data were collected during the August 2013 destructive sampling period. The interaction between root spiraling prevention method and opacity treatments was statistically significant (P = 0.01). Abbreviations are: CB (control with black color), CC (control with clear color), CG (control with green color), RB (internal ridges with black color), RC (internal ridges with clear color), RG (internal ridges with green color), SB (side-slits with black color), SC (side-slits with clear color), and SG (side-slits with green color). Means (±SE) not accompanied by the same lowercase letters are significantly different (α = 0.05) according to Fisher’s LSD test.

Fig 6

doi: https://doi.org/10.1371/journal.pone.0177904.g006