Fig. 1. (a) Location of pits where soil solution samplers were installed in Autryville and Blanton soils on a 20-yr-old swine farm in Sampson County, NC, and (b) schematic of soil solution samplers as installed at each site in Fig. 1a (time-domain reflectometry [TDR] probes were only installed at Blanton Site I and Autryville Site II).