Agronomic Efficiency of Biosolid as Source of Nitrogen to Banana Plants

Figure 3

Nitrogen (a), phosphorus (b), and potassium (c) concentrations in banana leaves with sewage-sludge () and mineral fertilizer (). Columns with the same letter on top, within crop season, indicate that the mean does not differ by Tukey’s HSD test (). ns = ANOVA test is not significant for treatments effects (). Dashed line represents the nutrient critical level (NCL) according to Raij et al. [37].

(a)

(b)

(c)