December 19, 2023
Dickinson Research Extension Center Updates

Phosphorus Fertilizer Impacts on Soybean Yield
Chris Augustin – Director,
Dickinson Research Extension Center
701-456-1103
Chris.augustin@ndsu.edu
Soybean is a new crop for many west river farmers. Fertilizer trials are needed to help producers better manage their inputs. This project looked at the impact of phosphorus fertilizer on soybean yield at the Dickinson Research Extension Center. A highlight of this study is available on the DREC YouTube page: https://www.youtube.com/watch?v=wuZwnsObbqo 
The experimental location had an Olsen phosphorus test of 5 ppm and soil pH of 5.6. Triple Super Phosphate (0-46-0) was hand applied shortly after planting. Phosphorus treatments were 0, 23, 46, 69, and 92 lbs P2O5/ac. Plots were 30x10 ft with four replications. The middle five feet of each plot was harvested to reduce the impact of adjacent treatments. The soybean variety NDSU 17009GT was planted at 150,000 pls/a.
Even though the initial phosphorus test of 5 ppm would be considered “low”, the phosphorus treatments did not impact soybean yield (Table 1). Many researchers have found soybean to be an efficient nutrient scavenger and phosphorus results are conflicting. More research on this will occur with multiple sites each year to develop a better understanding of soybean phosphorus management.  

 
We thank the North Dakota Soybean Council for their financial support for this project!


‌
‌
‌
NDSU Dickinson Research Extension Center logo
The NDSU Extension does not endorse commercial products or companies even though reference may be made to tradenames, trademarks or service names. NDSU encourages you to use and share this content, but please do so under the conditions of our Creative Commons license. You may copy, distribute, transmit and adapt this work as long as you give full attribution, don’t use the work for commercial purposes and share your resulting work similarly. For more information, visit www.ag.ndsu.edu/agcomm/creative-commons.

County commissions, North Dakota State University and U.S. Department of Agriculture cooperating. NDSU does not discriminate in its programs and activities on the basis of age, color, gender expression/identity, genetic information, marital status, national origin, participation in lawful off-campus activity, physical or mental disability, pregnancy, public assistance status, race, religion, sex, sexual orientation, spousal relationship to current employee, or veteran status, as applicable. Direct inquiries to Vice Provost for Title IX/ADA Coordinator, Old Main 201, NDSU Main Campus, 701-231-7708, ndsu.eoaa@ndsu.edu. This publication will be made available in alternative formats for people with disabilities upon request, 701-231-7881.