Can the presidedress soil N test help predict in-season fertilizer needs after fall-applied manure?
Study author(s): Melissa Wilson, University of Minnesota
Years of study: 2022
Location(s): Waseca, MN
Important: for the complete report, including all tables and figures, please download using the links to the right.
This study is being conducted at the Southern Research and Outreach Center (SROC) in Waseca, MN (Figure 1) which has high-yielding soils. This will allow us to test the PSNT under conditions that have been suggested to work well in other studies. Overall, we see this as a preliminary study to gather data on whether the PSNT can work.
The first year of the first rotation has been completed. Corn and soybean were planted last growing season (2022). Dairy and swine manure were applied following harvest to prepare for the next corn crop. Initial soil samples were collected to determine if P and K fertilizers need to be applied in the spring to the non-manured plots. Since the main bulk of the research in rotation 1 will not be completed until 2023, we do not have any results to report.