Fig. 1. Leaching rates of NH+4, NO-3, NH+4 + NO-3, and orthophosphate in 1997, 1998, and 1999 as measured by resin lysimeters. (A = ambient CO2, E = elevated CO2)
Fig. 1. Leaching rates of NH+4, NO-3, NH+4 + NO-3, and orthophosphate in 1997, 1998, and 1999 as measured by resin lysimeters. (A = ambient CO2, E = elevated CO2)