Fig. 1From: Influence of soil properties on the heartwood colour of Juglans mandshurica var. sachalinensis in a cool temperate forestRelationship between colour values (a and b) of Juglans mandshurica var. sachalinensis and exchangeable Mg contents in soil. The statistical significance of the relationship was shown as p value analysed with GLM. The fitness of the GLM was defined with D2 value following [3]Back to article page