2024
State-Wide Evaluation of P Rates Required by Soybean in ND
Contributor/Checkoff:
Category:
Sustainable Production
Keywords:
DiseaseField management Pest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Lindsay Malone, North Dakota State University
Co-Principal Investigators:
Project Code:
NDSC 2024 Agr 24
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:
There is a need for a reevaluation of phosphorus (P) fertilizer recommendations for soybean production in North Dakota. Generally, soil P levels are lower in North Dakota than other states, necessitating careful management and potentially more frequent applications. Current recommendations only allow P applications to soybean fields with low or very low P levels, which may be leading to yield losses in soybean. Phosphorus rates for soybeans are not being examined, and have never been examined in a statewide effort. The project will consist of eight locations of P rate studies with two sites at each location.
Key Beneficiaries:
#agronomists, #applicators, #extension specialists, #farmers
Unique Keywords:
#agronomy, #phosphorus, #soil fertility, #soybean quality, #yield
Information And Results
Project Summary

There is a need for a reevaluation of phosphorus (P) fertilizer recommendations for soybean production in North Dakota. In general, soil P-levels are lower in ND than other states, necessitating more careful P-management and potentially more frequent applications. Recent research showed increases in soybean yield with P-application in Minnesota on soils with moderate P-levels, but not in North Dakota (Franzen, 2019). Therefore, current recommendations only allow P-applications to soybean to fields with low or very low P-levels, which may be leading to yield losses in soybean not adequately supplied with phosphorus. Phosphorus rates for soybean are not being examined in ND currently, and have never been examined with a coordinated state-wide effort.
The study will consist of 8 locations of P rate studies, rates of P at 23/46/69/92 lbs P2O5 per acre in a randomized complete block design. The work will be conducted out of the Fargo experiment station, Minot, Dickinson and Carrington REC's, with 2 sites radiating from each site/collaborator. It is hoped that a 2nd year will be funded, so that changes in P recommendation rates to soybean will stem from 16 total locations, enabling regional differences to be considered if necessary.

Project Objectives

The objective of this study is to establish meaningful phosphorus application rates for soybean across ND.

Project Deliverables

New P rate recommendations to ND soybean growers

Progress Of Work

Updated January 5, 2024:

View uploaded report PDF file

Final Project Results
Benefit To Soybean Farmers

Project is meant to maximize efficiency of inputs through proper rate development.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.