Evaluating the Haney Test as a Tool in Soil Fertility Management in MN
Study author(s): Lizabeth Stahl, University of Minnesota
Years of study: 2016
Location(s): Waseca MN, Lamberton MN
Important: for the complete report, including all tables and figures, please download using the links to the right.
summary
Results of this project to date demonstrate that soil test levels for N can vary dramatically between standard soil testing methods and the Haney test. This in turn, can have a significant impact on recommended fertilizer rates and economic and environmental impacts due to over- or under-application of nutrients. Impacts of using the Haney test on P and K application rates was also studied and preliminary results were published in a U of MN Extension fact sheet in 2016 (10).
We plan to continue this work over the next couple of years to help compare the sensitivity of the Haney test and standard soil sampling methods to changes in soil nitrogen levels over time. Collecting this information over a variety of soil types and over several years will also help determine if further correlation and calibration work is warranted with the Haney test.