Fig. 8From: Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomassResults of Pearson’s correlation analysis among soil and plant properties. Values in the cells = correlation coefficient r, calculated on the level of significance p: ≤ 0.1 (⋅), ≤ 0.05 (*), ≤ 0.01 (**), ≤ 0.001 (***)Back to article page