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Bermudagrass Management in the Southern Piedmont USA

VII. Soil-Profile Organic Carbon and Total Nitrogen

USDA-ARS, 1420 Experiment Station Road, Watkinsville, GA 30677-2373

View larger version (18K): [in a new window]   Fig. 1. Organic C concentration (mean ± standard deviation) in the soil profile from individual analyses of 122 cores collected at the initiation of the experiment in April 1994. Depths sampled were 0 to 0.06, 0.06 to 0.15, 0.15 to 0.3, 0.3 to 0.6, 0.6 to 0.9, 0.9 to 1.2, and 1.2 to 1.5 m.

View larger version (42K): [in a new window]   Fig. 2. Net change in soil organic C content by depth and cumulatively in the profile as affected by distance from shade/water and forage utilization from 1994 to 1999. Data points falling in the zone between 0 and the dotted line are not significantly different from zero at P = 0.1.

View larger version (40K): [in a new window]   Fig. 3. Net change in total soil N content by depth and cumulatively in the profile as affected by distance from shade/water and forage utilization from 1994 to 1999. Data points falling in the zone between 0 and the dotted line are not significantly different from zero at P = 0.1.