Fertilization of Extremely Grazed and Moderately Grazed Mixed-Grass Prairie with Slow Release Phosphorus and Urea




There are many questions that need to be answered concerning the effect of production and species diversity, whether it is with phosphorus or nitrogen fertilizer. During the past three years changes have been very slow and not statistically significant although in the fourth year of the trial, effects are starting to present themselves and trends are starting to form. The growing season of 2004 will be the fifth and final season of the fertilization study and should determine if botanical changes are in fact taking place and if the herbage production differences with phosphorus and nitrogen are affected by the wide range of precipitation levels over the past four years. A full report on botanical change will be presented in 2004.


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NDSU Central Grasslands Research Extension Center
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