Control over Fundamental Soil N Cycling Process in Minnesota Cropping Systems: Nitrification, Nitrosation

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Start Date: 2014

Principal Investigator: Micheael Sadowsky

Organization: University of Minnesota, Department of Soil, Water and Climate

Status: Complete

Background Information:

This research seeks to understand the fundamental interactions of soil microorganisms with ammonium and with nitrite, in the two-step process of transforming nitrogen from its inorganic to its more highly mobile, mineralized form. Urea was applied at five rates across all the testing sites. Soil samples from eight different Minnesota locations account for the variety of textures from clay to sandy loam, as well as the impact of different cropping systems (corn/beans, corn on corn, and even one continuous soybean) and cultivation methods (conventional, no-till, etc.). In order to fully understand the interaction of soil, fertilizer and microbial communities, researchers are testing soils for carbon and nitrogen content, particle size, pH, ammonium sorption capacity and cation exchange capacity.

 Key Findings:

©2017 Agricultural Fertilizer Research and Education Council of Minnesota