Figure 1

Mean concentrations of total P, DRP, and other-P in each effluent sample before and after slurry or mineral P application to the soil columns (n=3 for the control of the clay loam throughout the experiment, and for the SP-Incor and MinP treatments of the clay loam after the laboratory P application, respectively; n=4 for all the other treatments). a. Total P for the clay loam; b. Total P for the loamy sand; c. DRP for the clay loam; d. DRP for the loamy sand; e. Other-P for the clay loam; and f. Other-P for the loamy sand (Note that the scales of Y-axis differed with soils).