Soil Fertility

fertilizer applicator in the field
Nebraska research shows that most NE growers can reduce their normal nitrogen rate in corn following alfalfa by applying the proper N credit. (Photo by Laura Thompson)

Cutting Costs Without Hurting Yields? Check Fertilizer N Rates in Corn after Alfalfa February 22, 2017

With tight crop margins for the 2017 growing season, many farmers are looking for ways to cut input costs without hurting yields. One way to do this is by giving the appropriate nitrogen credit when calculating how much N to apply to corn grown after a prior alfalfa crop.

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The Long View of Nitrogen Recommendations from Nebraska Extension January 6, 2017

At the 2017 Crop Production Clinics, the Nebraska Extension Soils Team is presenting a historical overview of how nitrogen recommendations for corn have developed and changed since the 1950s. We are also discussing what may lay ahead for nitrogen management.

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cover crops

Is Nitrogen Fixation Oversold with Legume Cover Crops? December 16, 2016

One expected benefit of using legumes as a cover crop is to provide a source of nitrogen (N) to the cropping system. However, when legumes are included in mixtures with grasses and broadleaves for a relatively short growing period, the amount of actual fixed N may be relatively low.

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Project SENSE Sessions to Feature High-Tech Sensors in Action July 20, 2016

Project SENSE update sessions are planned for several locations across Nebraska. Growers will learn how to outfit and implement the project's nitrogen management strategy on their operations. Project SENSE (Sensors for Efficient Nitrogen Use and Stewardship of the Environment) focuses on improving the efficiency of nitrogen fertilizer use.

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Nitrogen Rescue Treatments in Corn June 17, 2016

When corn is yellow and struggling to get nitrogen, a rescue treatment may be advisable. Research in neighboring states found a rescue treatment could increase yields by an average 34 bu/ac.

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Nitrogen cycle
Figure 1. The nitrogen (N) cycle illustrates how complex this nutrient is. There are several ways this essential nutrient for corn production can be lost. (Source: Nebraska Extension guide, Nutrient Management for Agronomic Crops, EC155)

Q&As: How much N is Left? Do I Need More Starter When Replanting? May 27, 2016

Well, it seems not much has changed since the last article I wrote on nitrogen (N) management a few weeks back: more rain, more to come, and more uncertainty with regard to N. So, what do we do now and why I am not worried about the other nutrients? Why is it always about N?

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Project SENSE sensors in the field.
Figure 1. UNL researchers are testing the use of crop sensors and real-time N application in the field based on sensor readings. The project was started with 17 sites across the state in 2015 and will be expanded to 20 more sites in 2016.

UNL Project SENSE Expanding Research to Increase N Efficiency May 5, 2016

When and at what rate nitrogen fertilizer should be applied are major questions for today's corn producers. Nebraska Extension is helping answer these questions through Project SENSE, which stands for Sensors for Efficient Nitrogen Use and Stewardship of the Environment.

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Managing N in a Wet Spring May 5, 2016

USDA NASS estimated 26% of Nebraska’s corn acres had been planted as of May 2, well behind last year’s pace of 45% and slightly behind the five-year average of 31%. The pace is undoubtedly being affected by the amount of precipitation across the state and the wet field conditions (Figures 1 and 2).

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