What is the recommended nitrogen application rate for corn in Illinois?

The recommended nitrogen application rate for corn in Illinois typically falls within the range of 150 to 200 pounds of nitrogen per acre. This amount is considered optimal for maximizing yield while ensuring that nutrient efficiency is maintained. The rationale behind this recommendation is based on multiple factors, including soil type, previous crop history, expected yield goals, and environmental conditions.

Applying nitrogen at this rate allows for sufficient nutrient availability throughout the growth stages of corn, particularly since corn has high nitrogen demands during key developmental phases, such as vegetative growth and ear formation. Studies and agronomic recommendations in Illinois have shown that nitrogen within this range helps achieve a balanced supply that can enhance grain quality and overall productivity, while also minimizing the potential for nitrogen loss and environmental impact.

While lower rates may not support optimal growth under typical conditions, excessively high rates could lead to nutrient leaching, groundwater contamination, and financial inefficiency. Therefore, using 150 to 200 lbs of N per acre strikes an effective balance for managing crop health and economic considerations in Illinois corn production.