| Value | Category | Cases | |
|---|---|---|---|
| 1 | flooding the area | 24 | 
                                                                 
                                    
                                    44.4%
                                 
                                                             | 
                                                        
                    
| 2 | dispersing drop by drop to the base of the plant | 16 | 
                                                                 
                                    
                                    29.6%
                                 
                                                             | 
                                                        
                    
| 3 | other. specify 1: | 14 | 
                                                                 
                                    
                                    25.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 652 |