Effect of storage time on the soluble phosphorus concentration of unfiltered runoff samples
1981
Sharpley, A. | Simmons, D. | Eggleton, G.
The change in soluble P concentration of unfiltered runoff samples with time following sample collection was investigated using simulated rainfall. No effect of storage time on soluble P concentration for 2 unfertilized soils was observed. With fertilized soils (50 kg P/ha) large increases (25%) in soluble P concentrations in runoff were observed when samples were stored for 24 hr at 4 C if the sediment content was 3500 mg/l or more. With a decrease in sediment content below 2000 mg/l, little change in soluble P concentration (<10%) was found in runoff from both fertilized and unfertilized soil. The results are discussed in terms of water quality monitoring for several other inorganic and organic pollutants.
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