Fig. 5. Nematode biomass C at 31 d; NT = no-till, ST = standard tillage, +Res = residue added, –Res = no residue added, Row = cores taken from plant row, Ctr = cores taken from the bed center, Int = cores taken from an intermediate position between the plant row and the bed center. There were no statistical differences at 0- to 5-cm depth. Statistical differences are expressed with s and t at 5- to 15-cm depth. The error bars show the standard error.