Regarding soybeans and bees, check with Kim Flottum, editor of Bee Culture.     
He did some work on soybeans and attractiveness about 10 years ago,             
written up in ABJ. They found some interesting things.  He's at                 
[log in to unmask]                                                               
                                                                                
Hope this helps, Diana S                                                        
                                                                                
Diana Sammataro, Ph.D.                                                          
The Ohio State University, OARDC/ Dept. Entomology                              
Extension Bee Laboratory, 1680 Madison Avenue                                   
Wooster, OH 44691                                                               
NEW Phone: (330) 263 3912  Fax: (330) 262 2720                                  
Email: [log in to unmask]