Resource Number: 50420
Title: Soybean Nitrogen Nutrition
Publisher: Science for Success
Resource Type: Fact sheet
Description:
Understanding the nitrogen requirements of soybean is key to producing a high-yielding crop. This factsheet walks through the basics of nitrogen sources, soybean nitrogen requirements, and other important factors to consider when evaluating your crop's nitrogen needs. Some key takeaways include:
1. Soybean crops have two main sources of N supply: indigenous N supply, and biological N2 fixation.
2. There are emerging cases of N limitation in fields of more than 70 bu/ac and with low levels of indigenous N supply.
3. N limitation is caused by asynchrony between biological N fixation and soil N supply in high-yielding environments.
4. Currently, there is no research-based diagnostic tool to test N limitation in soybean.
Last Updated: August 4, 2025
Contributors:
Domain(s)/Area(S):
- Agricultural Systems
- Crop Management
Locations: