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Perennial Ryegrass Growth, Development and Seed Yield Influenced by Phosphorus Source, Rate, Placement and Timing

Study Author(s): Nancy Ehlke, University of Minnesota, Department of Soil, Water, and Climate
Years of study: 2014 – 2016
Location(s): northwestern Minnesota

Important: for the complete report, including all tables and figures, please download using the links to the right.


Severe winterkill and wet soil conditions impacted trials resulting in a loss of complete experiments and more variable data on trials that were harvested. Trials were re-established in 2015 for data collection in 2016 to meet the objectives of the grant. Data collected in 2015 from Objective 1 and 3 is presented below, reliable conclusions cannot be drawn from the data due to stand variability and winter injury.

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