Fig. 2From: Effect of biodegradable poly-3-hydroxybutyrate amendment on the soil biochemical properties and fertility under varying sand loadsSoil activities of A dehydrogenase activity, B arylsulfatase, C N-acetyl-β-D-glucosaminidase, D urease, E β-glucosidase and F phosphatase in the growth substrates; the lowercase letters indicate significant differences at p ≤ 0.05Back to article page