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Fluid Journal : Winter 2016
ID Percent PAdded Figure 3. Idaho Percent P Added: There were no significant differences between the 3 treatments; however} DAP had more actual fertilizer P in the first section compared to the other treatments. Although there was enhanced P movement in the second section for APP it was not significant. by the total P mass added to each dish and multiplying by 100. The net increase in the total P mass is the total P concentration in each dish ring minus the control P concentration and multiplying by the soil mass in that ring. Percent Resin P was calculated in each dish section for each soil as resin extractable P concentration divided by total P concentration then multiplied by 100. Lab data collected were analyzed with the Proc Mixed procedure using SAS software (SAS 9.2, 2008). The Bonferroni Pairwise Method was used for treatment comparison at a 0.05 level of significance Analysis. The fertilizer products and soils were analyzed using Scanning Electron Microscope (SEM) connected with Energy-dispersive X-Ray spectroscopy (EDS). The 0-7.5 mm dish sections for all 3 research soils were analyzed further for reaction products formed during incubation using synchrotron-based P K-edge x-ray AU Incubated DAP granule Scanning Electron Microscopy/Energy Dispersive Spectroscopy Figure 4: Elemental analysis of the inside of an incubated AU DAP granule using energy dispersive spectroscopy Scanning electron micrograph of the inside of an incubated AU DAP granule Red= Ca Green= P Blue= Fe Winter 2016 The Fluid Journal 6