LOCATIONS SUBMITTING DATA FOR 1997



 State                          Location                            Code


 Arizona                        Tucson                               AZ1

 Iowa                           Ames                                 IA1

 Illinois                       Urbana                               IL1

 Illinois                       Carbondale                           IL2

 Kentucky                       Lexington                            KY1

 Massachusetts                  Amherst                              MA1

 Michigan                       East Lansing                         MI1

 Minnesota                      St. Paul                             MN1

 New Jersey                     North Brunswick                      NJ1

 Oklahoma                       Stillwater                           OK1

 Quebec                         Quebec                               QE1 

 Rhode Island                   Kingston                             RI1

 Texas                          Dallas                               TX1

 Washington                     Pullman                              WA1

 Wisconsin                      Madison (Native Soil)                WI1

 Wisconsin                      Madison (Sand)                       WI2