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Fig. 1. Leaching of fecal coliforms (FC) from sand-packed lysimeters irrigated with oxidation pond effluent. (A) Seasonal average FC counts, and (B) recoveries are presented (vertical bars denote standard errors) in the leachate from lysimeters that were either unplanted at LF 1 (NT-1) or planted with a Eucalyptus tree and maintained at LF 0.2 (T-0.2) or intermittent leaching (T-Int.) regimes. The sand was either not amended or amended with biosolids compost (BC) at a rate equivalent to 625 Mg ha–1.
