Nitrogen

Fertilizer-nitrogen Injury to Corn

May 17, 2023

Nebraska Extension recommendations on minimizing crop injury from anhydrous ammonia applications.

4Rs Field Day tent — Nitrogen management with sensor-based fertigation is one of many topics that will be discussed by experts from the University of Nebraska-Lincoln and Iowa State University during the 2023 4Rs Nutrient Stewardship Field Day.

Nebraska 4Rs Nutrient Stewardship Field Day Set for July 6

April 27, 2023

This year’s 4Rs Field Day will focus on up-to-date research information and demonstrations on all three major crop nutrients: nitrogen, phosphorus and potassium.

Irrigation system in corn — Producers looking to take advantage of nitrate-nitrogen in groundwater to reduce nitrogen applications this growing season may want to test their wells to determine current levels. Information on testing requirements is available at all local NRD offices.

Don’t Lose Out on Free Nitrogen from Irrigation Water

April 20, 2023

Extension recommendations for calculating the amount of nitrate-nitrogen in irrigation water and optimal timing of applications to reduce the cost of nitrogen inputs in irrigated corn.

Alfalfa and corn fields — As it aggressively scavenges nitrogen in the soil, alfalfa can greatly reduce nitrate contamination of groundwater with no negative implications for future crops if planted in rotations.

Alfalfa in Rotation with Annual Crops Reduces Nitrate Leaching Potential and Increases Soil Organic Carbon Sequestration

March 30, 2023

This UNL research study provides insights on the rotation of annual crops with alfalfa as a highly effective means of reducing nitrate-nitrogen contamination in groundwater.

Tractor spraying soil — For producers planting corn-on-corn this growing season, Nebraska Extension encourages taking soil samples to determine accurate nitrate levels and adjusting N application rates accordingly, as there may be considerable amounts of residual nitrogen left from the previous corn crop.

Understanding Soil Residual Nitrogen and its Dollar Value for Next Crop

March 14, 2023

For producers planning corn-on-corn this growing season, there may be a substantial opportunity to reduce nitrogen fertilizer applications, as drought and reduced yields likely left higher-than-normal residual N in many fields.

Farmers discuss ag tech — Taylor Cross (right), a graduate student in mechanized systems management, speaks with Nebraska ag producers Doug Jones (left) and Tony Jones about the sensor-based fertigation management technology that’s been shown to increase nitrogen-use efficiency and profitability in on-farm research. (Photo courtesy Nebraska Today | Hannah Gaebel Dorn, HG Images)

Sensor-based Fertigation Management Research Boosts Efficiency, Profitability

March 9, 2023

Tested on cornfields in eastern Nebraska, the study's sensor-based fertigation produced about 44 pounds more grain per pound of nitrogen than traditional methods, with an increase in profitability ranging from $28-$40 per acre.

Jinliang Yang in sorghum field — Jinliang Yang, assistant professor of agronomy and horticulture, is leading an effort to better understand sorghum’s genetic makeup to improve the crop’s nitrogen use efficiency. (Photo by Craig Chandler, University Communication)

Husker Research Hones in on Sorghum’s Genetic Makeup to Improve Nitrogen Efficiency

October 6, 2022

This new research will focus on increasing sorghum’s fertilizer use efficiency, as well as other aspects of sorghum’s fertilizer use, including nitrogen sensing, signaling and downstream regulatory pathways.

Using a Cornstalk Nitrate Test to Evaluate Nitrogen Management Decisions

September 29, 2022

At the end of the season, a nitrate test can help determine whether the crop was under-, adequately or over-fertilized with nitrogen, resulting in the potential to significantly reduce input costs.

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