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Figure 6

From: Phyllopertha horticola (Coleoptera: Scarabaeidae) larvae in eastern Austrian mountainous grasslands and the associated damage risk related to soil, topography and management

Figure 6

The effect of grub feeding on the measured humus contents. Scatter plot showing the relationship between the humus content, derived from the eBOD soil map, and the humus content in the soil samples; small circles: sites with grub densities ≤ 50 individuals/m2 (all species), large circles: sites with grub densities > 50 individuals/m2; dashed line = regression line for the two humus variables, R2 corr. = 0.16, p = 0.046.

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