Nitrogen is an essential nutrient for corn, but too much can cause problems. The optimal amount of nitrogen for corn depends on a number of factors, including the type of soil, the climate, and the desired yield. However, as a general rule, corn should not receive more than 200 pounds of nitrogen per acre per year.

Applying too much nitrogen can lead to a number of problems, including:

* Excessive growth. Corn plants that receive too much nitrogen will grow excessively tall and lush, which can make them more susceptible to lodging (falling over). Lodging can reduce yields and make harvesting more difficult.

* Leaf burn. Too much nitrogen can cause the leaves of corn plants to burn, which can reduce photosynthesis and stunt growth.

* Grain quality problems. Corn plants that receive too much nitrogen may produce grain that is high in protein and low in starch, which can make it less desirable to buyers.

* Environmental problems. Excess nitrogen can leach into groundwater and surface water, where it can cause algal blooms and other water quality problems. Nitrogen can also contribute to air pollution, when it is released into the atmosphere as nitrous oxide.

It is important to work with a qualified agronomist to determine the optimal amount of nitrogen to apply to your corn crop.