![thumbnail image](https://extension.entm.purdue.edu/newsletters/pestandcrop/wp-content/uploads/sites/2/2022/04/Fig1.png)
Corn yield response to increasing nitrogen (N) rate follows the Law of Diminishing Returns – as higher and higher increments of N are applied, the increase in grain yield becomes smaller and smaller (Figure 1). Eventually, maximum yield occurs and applying more N does not increase yield any further.