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Bermudagrass Management in the Southern Piedmont USA. III. Particulate and Biologically Active Soil Carbon

U.S. Department of Agriculture–Agricultural Research Service, J. Phil Campbell Sr. Natural Resource Conservation Center, 1420 Experiment Station Road, Watkinsville, GA 30677-2373

View larger version (37K): [in a new window]   Fig. 1. Soil depth distribution of particulate organic C, soil microbial biomass C, and potential C mineralization during 24 d at 0, 2, and 4 yr of bermudagrass management varying in harvest strategy. LSD bars are p = 0.1 among harvest strategies within a soil depth and year.

View larger version (40K): [in a new window]   Fig. 2. Relationships of total organic C (TOC), nonparticulate organic C (Non-POC), particulate organic C (POC), soil microbial biomass C (SMBC), potential C mineralization during 24 d (CMIN), and basal soil respiration (BSR) with the flush of CO2–C following rewetting of dried soil. Values are treatment means within a year and soil depth (n = 144).