Guadua angustifolia biochar/TiO<sub>2</sub> composite and biochar as bio-based materials with environmental and agricultural application.

angustifolia , dry weight had values between 0.89 and 3.35 g for those sown in soil and between 0.1 and 2.05 g for those in soil with BGAK with highly significant differences according to t-test two-tailed ( p = 0.0083) (Shapiro-Wilk test soil without BGAK p = 0.451, soil with BGAK p = 0.139; Levene’s test p = 0.117) (Fig. 5 ).

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