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Soil Nitrogen Dynamics and Maize Production in Municipal Solid Waste Amended Soil

^a Dep. of Natural Resource Sciences and Landscape Architecture, H.J. Patterson Hall, Univ. of Maryland, College Park, MD 20742 USA
^b Dep. of Crop Science, Univ. of Illinois, Urbana, IL 61801 USA

View larger version (29K): [in a new window]   Fig. 1 Maize biomass and grain responses to N fertilizer rates in 1995

View larger version (28K): [in a new window]   Fig. 2 Maize biomass and grain responses in 1996 to municipal solid waste compost (MSWC) treatments applied in December 1994. DM, dry matter

View larger version (22K): [in a new window]   Fig. 3 Cereal rye cover crop total dry matter (DM) and total plant N content responses to municipal solid waste compost (MSWC) treatments applied in December 1994. Rye was harvested in April 1996

View larger version (23K): [in a new window]   Fig. 4 Cereal rye cover crop total dry matter and total plant N content responses to N fertilizer rates applied in 1995. Rye was harvested in April 1996

View larger version (40K): [in a new window]   Fig. 5 Soil NO3–N at depth for 1995 for the zero and highest municipal solid waste compost (MSWC) treatments and two N fertilizer rates. Error bars indicate LSD (0.05)

View larger version (24K): [in a new window]   Fig. 6 Cumulative CO2–C evolved for the six municipal solid waste compost (MSWC) treatments during laboratory soil incubation. Legend: Open symbols, 0 MSWC + N fertilizer at 0 (circles), 168 (squares), or 336 (triangles) Mg ha-1, corresponding to 0, 7.5, and 15 mg N 100 g-1 soil. Solid symbols, 126 Mg ha-1 MSWC (corresponding to 280 mg 100 g-1 soil) + N fertilizer at 0 (circles), 168 (squares), or 336 (triangles) kg ha-1. Error bar indicates LSD (0.05)

View larger version (22K): [in a new window]   Fig. 7 Soil NO3–N concentrations for the six municipal solid waste compost (MSWC) treatments during laboratory soil incubation. Legend: Open symbols, 0 MSWC + N fertilizer at 0 (circles), 168 (squares), or 336 (triangles) Mg ha-1, corresponding to 0, 7.5, and 15 mg N 100 g-1 soil. Solid symbols, 126 Mg ha-1 MSWC (corresponding to 280 mg 100 g-1 soil) + N fertilizer at 0 (circles), 168 (squares), or 336 (triangles) kg ha-1. Error bar indicates LSD (0.05)