Observed Linear Langmuir
SP (kg/ha) 2010 Storm Mean 0.030 0.044 0.031
    Total Annual 0.360 0.524 0.371
           
  2011 Storm Mean 0.009 0.007 0.002
    Total Annual 0.121 0.096 0.029
           
SP-Tile (kg/ha) 2010 Storm Mean 0.005 0.044 0.005
    Total Annual 0.063 0.532 0.060
           
  2011* Storm Mean N/A N/A N/A
    Total Annual N/A N/A N/A
*N/A data was not available for SP-Tile this year.
Table 3: Observed and APEX values for SP in surface runoff and SP-tile using the linear and Langmuir adsorption options for the corn (2010) and soybean (2011) years. Storm mean and total annual values were estimated for storm events during the growing season.