Effects of Nitrogen Application Timing on Corn Production and Soil Quality


Start Date: 2013

Principal Investigator: Paulo Pagliari

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

Status: Ongoing

Background Information

This research investigates the effects of splitting a single recommended rate of N that maximizes corn production into multiple applications throughout the season. Single fall and single spring applications were tried in addition to splitting into applications at preplant, V-6 and silking stages.


The research also examines the effects of splitting an N application throughout the season on microbial activity; and whether the total amount of N required for maximum corn yield can be reduced by applying small amounts throughout the growing season.


This research has been conducted for three consecutive years at three locations with different soil types. Plant tissue and soil samples (0 to 4 inches) during the corn years have been collected at seven times during the growing season for assessment of nutrient uptake and soil biological and chemical properties.

Key Findings

Data is currently being analyzed.

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