Connecting Soil Organic Carbon and Root Biomass with Land-Use and Vegetation in Temperate Grassland

Table 4

Results of four multiple linear mixed effect regression models each comparing response variables against bulk density and clay content as independent variables (fixed effects). Lower and upper bounds define simulated 95% confidence intervals while reports goodness-of-fit for multiple fixed effects.

Response variable	Bulk density		Clay content
	Lower	Upper	Lower	Upper
Soil organic carbon
SOC 0–20 cm	−2052	1857	−33.5	15.5	0.01
% 0–10 cm	−4.8	0.7	−0.03	0.04	0.07
Root mass (0–20 cm)	−10.8	2.2	−0.09	0.06	0.06
Bulk density (0–20 cm)			−0.006	0.002	0.03