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Soil Processes Affected by Sixteen Grassland Species Grown under Different Environmental Conditions

^a Dep. of Ecology, Evolution, and Behavior, Univ. of Minnesota, St. Paul, MN 55108, USA
^b Dep. of Forest Resources, Univ. of Minnesota, St. Paul, MN 55108, USA; F.A. Dijkstra, current address: Dep. of Environmental Studies, Univ. of California, 1156 High St., Santa Cruz, CA 95064, USA

View larger version (21K): [in a new window]   Fig. 1. Average net N mineralization rate separated by species (pooled across CO2 and N treatment). Error bars show standard error (n = 8).

View larger version (34K): [in a new window]   Fig. 2. Nonlabile soil C respiration (c), microbial C and N, and net N mineralization rate plotted against total plant biomass, labile C, and root N concentration, with regression lines. For the relationship between labile C and microbial C and N A. millefolium plots were excluded in the regression analyses, while for the relationship between labile C and net N mineralization L. perennis plots were excluded.