| Differences in maturity | Nutrition, water stress, varietal mix | 
| Leaf edging | Disease, nutrition, water stress | 
| Leaf rolling | Water stress | 
| Lesions or color change | Disease or nutrient deficiency | 
| Physical damage | Animals, insects, pests or cultivation damage | 
| Poor plant stand | Poor seed, poor land, preparation, seed planted too deep, pests, soil insects, moisture stress or flooding | 
| Plant wilting | Water stress, salinity, possibly root damage by insects | 
| Reduced plant size | Poor nutrition, water stress, salinity, varietal mix, low temperatures | 
| Weeds: management | Poor land preparation or late seeding after land preparation and rain |