Figure 1. (A) Vertical view of soil particles being transported by flowing water in a surface irrigated furrow on a calcareous silt loam soil. Also shown is an example of an under-cutting event that occurs on the bottom of the furrow which increases the sediment load of the flowing water. The irrigation water was chemically similar to the IRR water in this study. (B) A soil-solution sample being withdrawn from a rotating drum for filtration and P analysis.