Opportunities and Challenges Associated with the Integration of Variable Rate Irrigation and Variable Rate Nitrogen Applications in Corn
Webinar Details
When:
Jun 7, 2018 3:00 pm US/Eastern
Length: 01:00 (hh:mm)
Advance Registration NOT required.
View now on-demand.
Presenter(s):
- Dr. Tim Shaver - Associate Professor, University of Nebraska-Lincoln
Virtual Event Format:
Group Viewing Available:
In this Climate Learning Network and ANREP Climate Science Initiative joint webinar Dr. Tim Shaver of the University of Nebraska-Lincoln will discuss the possibilities and issues presented by the use of variable rate irrigation and variable rate nitrogen application in the production of corn.
Increased emphasis on water use efficiency in agriculture has led to the development and adoption of variable rate irrigation (VRI) technologies that greatly enhance the potential for increasing water use efficiency (WUE). Increasing WUE in irrigated agriculture is very important. It is equally important to recognize that water management does not occur in a vacuum. Nitrogen (N) management is directly affected by water management due to the solubility of N. Water and N are inter-related and how one is managed directly affects management of the other. In an attempt to better understand what is needed for the integration of VRI and variable rate N (VRN) management research is being conducted at the UNL Water Resources Laboratory near Brule NE USA. To date the results of this research has been mixed. In uniform soil types results show that as irrigation level and N level increase, yields increase as well. In highly variable soil types results vary temporally showing no response to VRI or VRN at times and well defined responses at other times. This study demonstrates the challenges and complexities involved with the interaction of water and nitrogen.
About Dr. Tim Shaver
Dr. Shaver is an Associate Professor at the University of Nebraska-Lincoln. His work focuses on precision nutrient management, irrigated and water limited cropping system nutrient management, management effects on soil physical properties, and remote sensing.
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