highly significantp < 0.001
The multivariate analysis of variance (MANOVA, Tables 4 and 5 ) revealed that the type of biodigestate used as feedstock for biochar production had a highly significant effect (partial η 2 = 0.52, 95% CI [0.41–1.00], p < 0.001) on all evaluated physiological variables in forage: fresh weight (MANOVA, F = 214.2, p < 0.001), dry weight (MANOVA, F = 140.0, p < 0.001), chlorophyll content (MANOVA, F = 376.4, p < 0.001), and moisture (MANOVA, F = 376.4, p < 0.001).