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Fig. 4. Ratio of leaching losses of molybdate-reactive phosphorus (MRP) in the N-fertilized (f) or unfertilized (nf) and no-tillage (NT) or chisel-plowed (CP) corn agroecosystems, relative to prairie MRP leaching losses, from January 1999 through September 2000. Standard error bars are provided for replicate measurements. Note the logarithmic scale on the y axis.
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