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Effect of Manure Application Timing, Crop, and Soil Type on Phosphorus Leaching

^a Department of Crop and Soil Sciences, Cornell University, Ithaca, NY 14853
^b Department of Plant and Soil Science, University of Vermont, Burlington, VT 05405

View larger version (56K): [in a new window]   Fig. 1. Plot layout and experiment design for manure application study on the clay loam site. The loamy sand site has an identical experiment design, but plots are 14 x 14 m and only have a single central drain in each plot.

View larger version (36K): [in a new window]   Fig. 2. Flow-weighted mean drain outflow total P concentration and precipitation during the 3-yr study for the clay loam site in maize. Arrows indicate times of manure application.

View larger version (37K): [in a new window]   Fig. 3. Flow-weighted mean drain outflow total P concentration and precipitation during the 3-yr study for the clay loam site in grass. Arrows indicate times of manure application.

View larger version (33K): [in a new window]   Fig. 4. Flow-weighted mean drain outflow total P concentration and precipitation during the 3-yr study for the loamy sand site in maize. Arrows indicate times of manure application.

View larger version (35K): [in a new window]   Fig. 5. Flow-weighted mean drain outflow total P concentration and precipitation during the 3-yr study for the loamy sand site in grass. Arrows indicate times of manure application.

View larger version (18K): [in a new window]   Fig. 6. Relation between drain line total P concentration and drain flow rate for the clay loam soil in maize and grass.

View larger version (16K): [in a new window]   Fig. 7. Relation between drain line total P concentration and drain flow rate for the loamy sand soil in maize and grass.