By Scout Nelson
University of Minnesota researchers are calling for two new field sites to expand ongoing lime evaluation trials in 2026. The study focuses on understanding how different lime sources affect soil pH, crop yield, and long-term soil health across diverse Minnesota conditions.
Currently, eight trials are underway across the state using quarry lime, pelletized lime (“pell lime”), and precipitated calcium carbonate (PCC) lime from the Southern Minnesota Beet Sugar Cooperative. “One interesting thing we’ve seen so far is that a few trials have shown little to no pH change from the lime application,” said Daniel Kaiser, an Extension nutrient management specialist. Researchers are eager to compare results in new environments.
The team seeks two additional field locations—one sandy site north of the Twin Cities and another in south-central or southwest Minnesota. Ideal sites have crops like dry beans or sugarbeets in rotation and surface soil pH around 5.5 or lower. Each trial plot will measure about 0.6 acres and remain active for five cropping seasons.
Different lime types will be applied at varying rates to monitor yield responses and pH adjustments. University personnel will collect yield data, while participating growers manage fields as usual. The project aims to refine lime rate recommendations, particularly for low cation exchange capacity (CEC) of soils like sands.
In addition, researchers need soil collection points from sandy areas with pH near 5.0 for lab calibration studies. These samples, enough to fill a 5-gallon bucket, will help fine-tune lime guidelines for light-textured soils.
Farmers and ag professionals interested in participating can contact Daniel Kaiser at dekaiser@umn.edu. The project receives funding from the Minnesota Soybean Research and Promotion Council and the Sugar beet Research and Education Board of Minnesota and North Dakota.
This research aims to strengthen Minnesota’s understanding of soil management practices and ensure sustainable crop productivity through better lime application strategies.
Photo Credit:gettyimages-shotbydave
Categories: Minnesota, Crops, Corn, Sugar Beets, Government & Policy, Weather