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Goat Urine and Limestone Affect Nitrogen and Cation Distributions in an Acidic Grassland

USDA-ARS Appalachian Farming Systems Research Center 1224 Airport Rd. Beaver, WV 25813-9423

View larger version (13K): [in this window] [in a new window]   Fig. 1. Volume of leachate collected between 3 May and 18 August as related to the amount of dry matter produced during the same period in limed (L) and unlimed (U) vegetated soil columns taken from an acidic Typic Hapludult grassland.

View larger version (12K): [in this window] [in a new window]   Fig. 2. Mean concentrations of NH4+–N in leachates collected over time from vegetative soil columns receiving zero, one, two, or three urine applications (X).

View larger version (13K): [in this window] [in a new window]   Fig. 3. Mean concentrations of NO3––N in leachates collected over time from vegetated soil columns receiving zero, one, two, or three urine applications (X).

View larger version (12K): [in this window] [in a new window]   Fig. 4. Concentration of KCl-extractable NH4+–N at 10 depths in acidic Typic Hapludult grassland columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine.

View larger version (13K): [in this window] [in a new window]   Fig. 5. Concentration of KCl-extractable NO3––N at 10 depths in acidic Typic Hapludult grassland columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine.

View larger version (15K): [in this window] [in a new window]   Fig. 6. Concentration of NH4OAc-extractable Ca at 10 depths in acidic Typic Hapludult grassland soil columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine. Values of Ca for the eight lower depths are given on the scale at the bottom of the figure.

View larger version (16K): [in this window] [in a new window]   Fig. 7. Concentration of NH4OAc-extractable Mg at 10 depths in acidic Typic Hapludult grassland columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine. Values of Mg for the eight lower depths are given on the scale at the bottom of the figure.

View larger version (16K): [in this window] [in a new window]   Fig. 8. Soil pHs (pH in 1:1 soil/0.01 mol L–1 CaCl2) measured at 10 depths in acidic Typic Hapludult grassland columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine. Values of pHs for the eight lower depths are given on the scale at the bottom of the figure.

View larger version (13K): [in this window] [in a new window]   Fig. 9. Concentration of KCl-extractable Al at 10 depths in acidic Typic Hapludult grassland columns with (L) and without (U) surface liming 27 wk after addition of four rates of goat urine.