Fig. 1.

Experimental Sites in the University of Maryland Eastern Shore Research Farm. (A) Dredged drainage ditch. (B) Undredged drainage ditch.

 


Fig. 2.

(A) Ammonium and nitrate equilibration phase, (B) uptake phase, and (C) release phase for ditch sediments during a 48-h flume experiment.

 


Fig. 3.

Ammonium and nitrate concentrations in solution at end of (A) simulated equilibration, (B) uptake, and (C) release phases. Different letters above columns indicate a difference in means based on Tukey's mean separation procedure.