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The Effects of Throughfall Manipulation on Soil Leaching in a Deciduous Forest

^a Environmental and Resource Sciences, Fleischmann Agriculture Bldg/370, Univ. of Nevada, Reno, NV 89557
^b Environmental Sciences Division, Oak Ridge National Lab., P.O. Box 2008, Building 1059, Oak Ridge, TN 37831-6422

View larger version (24K): [in a new window]   Fig. 1. Plot of total anions against total cations in soil solutions from the E and Bt horizons.

View larger version (26K): [in a new window]   Fig. 2. Soil water potential at 0 to 30 cm in the treatment plots from 1 Jan. 1996 through 31 Dec. 2000.

View larger version (45K): [in a new window]   Fig. 3. Measured fluxes of NH+4, NO-3, NH+4 + NO-3, and ortho-phosphate in resin lysimeters. Note that ortho-P was not measured in 1998–1999. Standard errors are shown. See Table 3 for statistical analyses.

View larger version (27K): [in a new window]   Fig. 4. Concentrations of Ca2+, K+, Mg2+, Na+, and Cl- in E horizon soil solutions (25 cm). See Table 4 for statistical analyses.

View larger version (29K): [in a new window]   Fig. 5. Sulfate, pH, electrical conductivity (EC), SO2-4 to Cl- ratios, and (Ca2+ + Mg2+) to K+ ratios in E horizon soil solutions (25 cm). See Table 4 for statistical analyses.

View larger version (31K): [in a new window]   Fig. 6. Concentrations of Ca2+, K+, Mg2+, Na+, and Cl- in Bt horizon soil solutions (70 cm). See Table 5 for statistical analyses.

View larger version (31K): [in a new window]   Fig. 7. Sulfate, pH, electrical conductivity (EC), SO2-4 to Cl- ratios, and (Ca2+ + Mg2+) to K+ ratios in Bt horizon soil solutions (70 cm). See Table 5 for statistical analyses.

View larger version (35K): [in a new window]   Fig. 8. Calculated fluxes of Ca2+, K+, Na+, Mg2+, Cl-, and SO2-4 in the Bt horizons. Values are based on average concentrations and modeled soil water flux. Errors bars represent standard errors associated with averge concentrations only. AMB = ambient, no treatment; WO = WET treatment, placed in the open away from drip points; DO = DRY treatment, placed between troughs; WT = WET treatment, placed near drip points; DT = DRY treatment, placed beneath troughs; DRY-Avg = area-weighted average fluxes in the DRY treatment.