Fig. 9From: Toward the replacement of conventional fertilizer with polyhalite in eastern China to improve peanut growth and soil qualitySpearman correlation heatmap. Statistical significance is considered as * p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001. Green or red colors represent a significant negative or positive correlation. The darker the color, the stronger the correlationBack to article page