Suat Irmak – Distinguished Professor, Soil and Water Resources and Irrigation Engineering

Harold W. Eberhard Distinguished Professor of Biological Systems EngineeringSuat Irmak

faculty
Work Chase Hall (CHA) 239
Lincoln NE 68583-0726
US
Work 402-472-4865 On campus, dial 2-4865

Faculty Bio

Figure 1. Corn in one of the irrigation research plots at the South Central Agricultural Lab was starting to show signs of stress Wednesday.
Figure 1. Corn in one of the irrigation research plots at the South Central Agricultural Lab was starting to show signs of stress Wednesday.

Soil Water Content- and Soil Matric Potential-Based Irrigation Trigger Values for Different Soil Types July 11, 2019

Keeping a close eye on soil water content in individual fields can help optimize irrigation efficiency. This article explores how to use research-based trigger points for various soil types using soil water content-based sensors or soil matric potential-based sensors. Nebraska research has shown that having 25% more water than needed in the maize root-zone reduced grain yields as much as 15 bu/ac.

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Chart of nitro use efficiency and partial profits

Profit and Nitrogen Use Efficiency Gain Using Sensor-Guided Fertigation January 9, 2019

A UNL study of sensor-based and model-informed fertigation treatments confirms that sensor fertigation treatments are consistently the most profitable and efficient methods of applying N compared to current best management practices (BMPs).

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Spring N application in the field
Growers planning for their 2019 N management in corn might consider the potential for increased N efficiency and reduced loss from split applications at planting and up to R3 growth stage rather than a fall application.

Consequences of Fall-Applied N November 9, 2018

A fall nitrogen application has a relatively high loss potential and is considered the riskiest N management practice. Consider breaking tradition and splitting your N applications next year to coincide with when your corn most needs more N.

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ETgage

Take Time to Set Up Nebraska Ag Water Management Equipment May 23, 2018

As you finish planting, consider installing ETgages and soil moisture sensors before crop roots interfere. Then join the hundreds of farmers contributing their data each week to the Nebraska Agricultural Water Management Network, a valuable tool for managing your crop.

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Soil moisture sensor only partially installed due to dry ground

Determining Beginning Soil Moisture for Planning Decisions April 12, 2018

Soil moisture sensors installed now can provide valuable information for dryland producers who want to determine existing soil moisture level and adjust cropping or planting plans accordingly. The authors installed and will be monitoring soil moisture readings at six sites in south central Nebraska.

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Chart of N research treatments

Feasibility of Sensor-Based Nitrogen Fertigation Management in Corn January 8, 2018

An article from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics on university research testing sensor-based N fertigation treatments.

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soybean field

Planting Soybean after Soybean (Part 1): Planting Considerations April 13, 2017

Farmers are increasing their soybean plantings for 2017, which likely means some are shifting to soybeans-after-soybeans. This article looks at what you should be considering at planting time as you consider changing your cropping sequence.

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Center pivot irrigated soybeans
Management in a successful soybean-after-soybean cropping system may require growers to make some slight adjustments in their practices, including irrigation, seed selection, and pest management.

Planting Soybean after Soybean (Part 2): In-Season Management Considerations April 13, 2017

In Part 1 of this article, we look at considerations for planting soybean after soybean. In this article, Part 2, we share considerations for in-season management.

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