Whole profile soil properties among sites
Soil organic C, total N, available P, and fungi:bacteria decreased while clay percentage increased with depth across the CZO network (all: p < 0.001, Fig. S1A-E). Across all sites, soil pH was relatively constant throughout the depth profile (p = 0.236, Fig. S1F). However, some individual sites showed decreases (e.g., SCST: p = 0.036) or increases (e.g., HARD: p = 0.040, PROV: p = 0.003) in pH with depth.