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Export of Manure Phosphorus and Nitrogen in Turfgrass Sod

^a Soil and Crop Sciences Dep., Texas A&M University, College Station, TX 77843-2474
^b Texas A&M University Research and Extension Center, Stephenville, TX 76401
^c Texas A&M University Research and Extension Center, Dallas, TX 75252-6599

View larger version (27K): [in a new window]   Fig. 1. The amount of P removed in bermudagrass clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 208 kg P ha-1) and high manure (HM, 419 kg P ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).

View larger version (27K): [in a new window]   Fig. 2. The amount of P removed in buffalograss clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 252 kg P ha-1) and high manure (HM, 500 kg P ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).

View larger version (25K): [in a new window]   Fig. 3. The amount of P removed in bluegrass clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 163 kg P ha-1) and high manure (HM, 327 kg P ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).

View larger version (32K): [in a new window]   Fig. 4. The amount of N removed in bermudagrass clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 695 kg N ha-1) and high manure (HM, 1402 kg N ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).

View larger version (31K): [in a new window]   Fig. 5. The amount of N removed in buffalograss clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 861 kg N ha-1) and high manure (HM, 1707 kg N ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).

View larger version (32K): [in a new window]   Fig. 6. The amount of N removed in bluegrass clippings during production and in plant (shoot + root) and soil components of a single sod harvest for replicated manure and fertilizer treatments. The treatments comprised low manure (LM, 246 kg N ha-1) and high manure (HM, 495 kg N ha-1) rates without inorganic N, similar manure rates plus inorganic N (LM + IN and HM + IN), inorganic N fertilizer only (IF), and an unfertilized control. Bars representing clippings or a sod component with the same letter are not statistically different (P = 0.05).