All spring we have been discussing deficiencies on corn plants and trying to determine if they are to blame on the weather or something else. Below are few fields with some images as examples.
Field 1: Healthy Corn, Adequate Nutrients, No Compaction
|Field 1. Striping, but no compaction.|
|Field 1. From a distance, the field looks better.|
Field 2: Sidewall Compaction
|Field 2: Striping on the leaves.|
|Field 2. Sidewall compaction is evident.|
|Field 2. Roots fan out along the seed furrow.|
These are two examples that were relatively easy to determine. Many fields fit somewhere in the middle of these examples, where compaction may be less of an issue, a nutrient may be borderline.
Field 3. Leaf Striping, No Compaction, Needs N
|Field 3. Striping, no compaction, but needs N.|
In Field 3, the corn has some leaf striping. There is no indication of compaction and most nutrients are adequate. The farmer was going to side dress N that day and that is probably all the corn plant needs. Some of the plants were shallow-planted and that could make the corn more prone to lodging late in the season. But, the crop is otherwise healthy and the full amount of N should be applied.
|Field 3. Shallow-planted but otherwise healthy.|
Thanks to Colby Guffey and Nick Carter, County Extension Agents for Agriculture and Natural Resources, for these images.