| Value | Category | Cases | |
|---|---|---|---|
| 1 | dap + urea | 2232 | 
                                                                 
                                    
                                    44.3%
                                 
                                                             | 
                                                        
                    
| 2 | dap only | 394 | 
                                                                 
                                    
                                    7.8%
                                 
                                                             | 
                                                        
                    
| 3 | urea only | 91 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    
| 4 | did not use | 2323 | 
                                                                 
                                    
                                    46.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 440 |