NU Water-Related Research in Grant County

The list below shows water-related research being conducted within your district or that affects your district. They are sorted by water topic, then by primary contact's last name.

Displaying 11 records found for Grant County


Topic
Project's Primary Contact Information
Name van Donk, Simon
Unit West Central Research and Extension Center
Email simon.vandonk@unl.edu
Phone 308-696-6709
Web Page http://westcentral.unl.edu/web/westcentral/svandonk
Project Information
Title Site-specific management of heterogeneous fields
Other(s) Richard Ferguson, Department of Agronomy & Horticulture, rferguson1@unl.edu; Tim Shaver, West Central Research & Extension Center, tim.shaver@unl.edu 
Description

Variable rate technology (e.g., for irrigation, fertilization, seeding) has developed rapidly, enabling agricultural producers to practice site-specific management on heterogeneous fields. However, knowledge is lacking on how to implement site-specific management; the variable rate technology is available to producers, but knowledge is needed on where, when, and how much water and/or nutrients to apply. A research project was started in 2011, studying the interactions of landscape position (topography), soil type, irrigation and nitrogen.

Impact:Producers will be able to better implement site-specific management on heterogeneous fields benefitting their economic bottom line as well as the environment.

Project Support John Deere
Project Website
Report
Current Status Continuing
Topic Crop Water Use
Project's Primary Contact Information
Name Hergert, Gary
Unit Panhandle Research and Extension Center
Email ghergert1@unl.edu
Phone 308-632-1372
Web Page http://panhandle.unl.edu/personnel_hergert
Project Information
Title No-till Cropping Systems for Stretching Limited Irrigation Supplies
Other(s) Paul Burgener, Panhandle Research and Extension Center, pburgener2@unl.edu; Alexander Pavlista, Panhandle Research and Extension Center, apavlista1@unl.edu 
Description

A no-till limited irrigated cropping system for stretching limited irrigation supplies, including winter wheat, corn, dry beans and canola, was initiated in 2005 at the Panhandle Research and Extension Center. Under limited irrigation, less water is applied than is required to meet full evapotranspiration demand and the crop is stressed. Irrigation levels are 5, 10 and 15 inches for corn and 4, 8 and 12 inches for all other crops The goal is to manage cultural practices and irrigation timing so the resulting water stress has less of a negative impact on grain yield. The objectives of the project are to: 1) develop limited irrigation production functions for lower water-using crops that fit the panhandle using a no-tillage cropping system to maximize water use efficiency; and 2) use production function data to develop economic information on the impact of reduced water on farm income and effects on local government and agricultural businesses. The research information is necessary to provide an on-going information base to support demonstration efforts similar to the current project in the Pumpkin Creek Watershed.

Project Support North Platte Natural Resources District
Project Website
Report
Current Status Underway
Topic Extension
Project's Primary Contact Information
Name Hergert, Gary
Unit Panhandle Research and Extension Center
Email ghergert1@unl.edu
Phone 308-632-1372
Web Page http://www.panhandle.unl.edu/personnel/personnel_hergert.htm
Project Information
Title Improving Nitrogen Management for White Wheat
Description

Winter wheat, long a mainstay of dryland agriculture in the Panhandle, is being grown on a growing number of irrigated fields because it will grow under limited irrigation and wheat prices have risen to cover irrigation costs. Nonetheless, limited irrigation and increasing fertilizer prices mean producers need to sharpen their management skills. Research is proving that soil testing, timing fertilizer applications and managing application rates are all very important to growing winter wheat.

Preliminary data from this research shows top yields come when one third of the fertilizer is applied in the fall and two-thirds at boot stage. Maximum yields have been produced when the amount of residual nitrogen in the top four feet of soil, along with the applied fertilizer, totals 200-210 pounds of nitrogen per acre. Top nitrogen rates to maximize yield have not been higher than 100 pounds per acre, which is lower than commonly used to produce high yields. These recommendations for white wheat should also apply to hard red wheat.

Project Support Nebraska Wheat Board
Project Website
Report
Current Status Underway
Topic Extension
Project's Primary Contact Information
Name Hergert, Gary
Unit Panhandle Research and Extension Center
Email ghergert1@unl.edu
Phone 308-632-1372
Web Page http://panhandle.unl.edu/personnel_hergert
Project Information
Title Panhandle Research and Extension Center
Other(s) Jim Schild, Interim Associate Director, jschild1@unl.edu; Steve Sibray, School of Natural Resources, ssibray1@unl.edu 
Description

The Panhandle Research and Extension Center, located in the heart of western Nebraska in Scottsbluff, houses 19 faculty with appointments in agriculture and family and consumer science through the University of Nebraska-Lincoln. Most of the faculty hold joint appointments in research and extension. The Cooperative Extension program in a 17-county area of the Panhandle and north-central Nebraska is also administered at the Center.

The University of Nebraska-Lincoln has had a presence in western Nebraska for over 85 years. In 1909, the University of Nebraska Experiment Station and the USDA jointly homesteaded a quarter section of land five miles east of Mitchell. Initial research was in the area of crop production under gravity irrigation. Research emphasis increased and soon included studies in sheep, swine, dairy, and beef production, in addition to many other crop areas. The 800 acre Experimental Range in Sioux County was deeded to the University of Nebraska by President Woodrow Wilson in 1918. Satellite agricultural laboratories at Alliance and Sidney, Nebraska were added in 1967. Through a fortunate set of circumstances, the headquarters of the Panhandle Station moved to the former Hiram Scott College campus after the state had acquired the property after the school closed in the early 1970s. The headquarters and surrounding research plots are located just north of the city of Scottsbluff. To reflect the University's involvement throughout the Panhandle, the name was officially changed to the Panhandle Research and Extension Center in 1985. The addition of the Learning Center, a joint effort of the Division of Continuing Studies and Cooperative Extension, in 1987 significantly enhanced the educational opportunities for western Nebraska residents.

Project Support Varies according to program and project - for more information see http://www.panhandle.unl.edu
Project Website http://www.panhandle.unl.edu
Report
Current Status Continuing
Topic Extension
Project's Primary Contact Information
Name Hergert, Gary
Unit Panhandle Research and Extension Center
Email ghergert1@unl.edu
Phone 308-632-1372
Web Page http://panhandle.unl.edu/personnel_hergert
Project Information
Title Limited Irrigation Cropping for Conserving Water Resources in the Pumpkin Creek Watershed
Other(s) Gary Stone, Panhandle Research and Extension Center, gstone2@unl.edu; C. Dean Yonts, Panhandle Research and Extension Center, cyonts1@unl.edu; Jim Schild, Panhandle Research and Extension Center, jschild1@unl.edu 
Description

Limited irrigation and no-till cropping systems are the focus of an extension project for the Pumpkin Creek Watershed which has a yearly NRD allocation of 12-inches for well irrigation. The project objectives are to: 1) demonstrate limited irrigation and no-tillage cropping systems to maximize groundwater supplies, and 2) educate area producers, local government and agricultural businesses about different management scenarios. Drought over the past eight years has magnified the problems associated with declining ground water in Pumpkin Creek and the High Plains Aquifer and maintaining profitable agriculture while protecting surface and ground water supplies is a complex issue. The demonstration project has shown producers that they can manage with less water, but they must adapt to new cropping and no-till systems and irrigation management techniques.

June 4, 2010 CropWatch Article

Project presentation by Gary Stone at the 2008 Water Colloquium

Project Support U.S. Department of Agriculture - Natural Resources Conservation Service, North Platte Natural Resoruces District
Project Website http://panhandle.unl.edu/pumpkincreek
Report Pumpkin Creek Poster Resized 40 x 48 4-20-2010.pdf
Current Status Underway
Topic Extension
Project's Primary Contact Information
Name Hergert, Gary
Unit Panhandle Research and Extension Center
Email ghergert1@unl.edu
Phone 308-632-1372
Web Page http://panhandle.unl.edu/personnel_hergert
Project Information
Title Consumptive Water Use Maps for the Nebraska Panhandle
Other(s) Ayse Irmak, School of Natural Resources, airmak2@unl.edu; Derrel Martin, Biological Systems Engineering, dmartin1@unl.edu; Gary Stone, Panhandle Research and Extension Center, gstone2@unl.edu 
Description

The use of ground water, especially for irrigation, is becominng regulated in Nebraska, in response to several factors:

  • Recurrent droughts across the High Plains and Inter-Mountain West have magnified the problem of declining ground water resources. The High Plains Aquifer (HPA), often referred to as the Ogallala aquifer, underlies Nebraska, Colorado, Kansas, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Nearly 30% of the ground water used for irrigation in the United States is extracted from the HPA. A significant proportion of the aquifer underlies Nebraska. In the North Platte Basin, the drought has resulted in reduced surface water deliveries, which in turn has led to less ground water recharge and declining water tables.
  • Nebraska ground water law has evolved. Ground water levels began declining in some parts of Nebraska after extensive irrigation development began in the 1960s. LB108 in 1996 recognized the relationship between ground and surface water, and LB962 (2004) provided new regulatory measures for integrated management of ground water and surface water. Natural resources districts (NRDs) have adopted allocations for ground water pumping in some areas. The North Platte NRD has established ground water allocations of 12 acre-inches in the Pumpkin Creek Basin and 18 acre-inches in the North Platte Valley for 2009. New or expanded ground water uses are prohibited throughout the NRD unless they are offset with transfers of existing uses.

The goal of this project is to develop the expertise in remote sensing image acquisition and computing, using the METRIC(tm) procedure; to produce area-specific consumptive water use (CWU) maps; and to develop, test and demonstrate the tools that will take these CWU maps and turn them into immediately usable products for planning, managing and regulating groundwater. The CWU maps will be the primary product of this project. They are developed from LANDSAT images by applying Mapping EvapoTranspiration with High Resolution and Internalized Calibration (METRIC(tm)) algorithms.

Project Support U.S. Department of Agriculture - Natural Resources Conservation Service
Project Website http://panhandle.unl.edu/web/panhandlerec/metric
Report
Current Status Website Available
Pic 1 Project Image
Pic Caption 1 Water level changes in the High Plains Aquifer from 1980 - 1994 
Topic Hydrology
Project's Primary Contact Information
Name Lenters, John
Unit School of Natural Resources
Email jlenters2@unl.edu
Phone 402-472-9044
Web Page http://snr.unl.edu/aboutus/who/people/faculty-member.asp?pid=743
Project Information
Title On Basin Residence Time and Annual Hydrology: Development of Annual Hydrology Model of the Sandhills Rivers
Other(s) Erkan Istanbulluoglu, University of Washington, erkani@u.washington.edu; Durelle Scott, Virginia Tech, dscott@vt.edu; Tiejun Wang, University of Washington-Seattle, tjwang@u.washington.edu 
Description

Simple models of annual and mean annual basin runoff and evapotranspration, such as the one proposed by Budyko, are useful for investigating the relationship between river flow and climate, and planning water storage structures in basins where long term streamflow measurements are not available. Such models are often based on the assumption that annual precipitation is in balance with annual runoff and evapotranspiration, and change in water storage of the basin is negligible. In basins where groundwater is the dominant source of streamflow this assumption hardly holds.

In this study first we develop a technique to investigate groundwater residence time to identify time scales over which a simple model of mean annual runoff can be meaningfully used. The model is applied in the Niobrara and Loup Rivers. Second we develop an annual hydrology model by solving the rate of change in basin storage. The runoff component of the model is based on the well-known linear reservoir model and a parameterization to characterize runoff on saturated areas. River water storages and streamflow diverted for irrigation are included as inputs in the model. The model explained as high as 80% of the annual variability of runoff in the Niobrara River at the Sparks gage. The model underscores the importance of saturation overland flow in the basin. Finally we used the model to investigate climate change scenarios, including extreme dry and wet conditions, as well as scenarios for the Medieval Warm Period during which Sandhills were destabilized as suggested by geological evidence.

Project presentation at the 2008 Water Colloquium

Project Support National Science Foundation
Project Website
Report Lenters_Groundwater.pdf
Current Status Published "On the role of groundwater and soil texture in the regional water balance: An investigation of the Nebraska Sand Hills", USA, Water Resour. Res., 45, W10413, doi:10.1029/2009WR007733.
Topic Production Agriculture
Project's Primary Contact Information
Name Yonts, C. Dean
Unit Panhandle Research and Extension Center
Email cyonts1@unl.edu
Phone 308-632-1246
Web Page http://bse.unl.edu/faculty33
Project Information
Title Conserving soil water using a no-till system with a crop rotation of sugarbeets, dry beans and corn
Other(s) John A. Smith, Panhandle Research and Extension Center, jasmith@unlnotes.unl.edu 
Description Use of no-till production systems for sugarbeets and dry edible beans is very low in western Nebraska. On the other hand, a significant part of the corn acreage in this region does use no-tillage, or a practice that is very close to no-tillage. There are several real and perceived reasons for this difference in acreage of no-tillage productions systems between these crops. Reasons often given include difficulty of precision planting, need for mechanical incorporation of herbicides, multiple cultivations for weed control, furrowing for furrow irrigation and for guidance for harvest operations, providing a ridge for harvest of dry beans, and the "tillage-like actions" of harvest equipment. With the availability of glyphosate resistant corn and sugarbeets, weed control becomes substantially easier. The experiment is designed to observe two different crop rotations - corn, dry beans, corn, sugarbeets and corn, corn, drybeans. Tillage systems being tested include conventional plow, zone till and no till. The primary objective of this project is to determine the amount of soil water conserved by no-till crop production compared to current production practices with a crop rotation of sugarbeets, dry edible beans, and corn. The secondary purpose is to measure effectiveness of planting and weed control systems for no-till dry beans and sugarbeets, and direct harvest of no-till dry edible beans using the newest available production technologies.
Project Support Anna Elliott Fund
Project Website
Report
Current Status Continuing
Topic Production Agriculture
Project's Primary Contact Information
Name Yonts, C. Dean
Unit Panhandle Research and Extension Center
Email cyonts1@unl.edu
Phone 308-632-1246
Web Page http://bse.unl.edu/faculty/Yonts.shtml
Project Information
Title Crop Management Workshop, August 20-21, 2008
Other(s) Jim Schild, jschild@unlnotes.unl.edu; John Smith, jasmith@unlnotes.unl.edu; Bob Wilson, rwilson@unlnotes.unl.edu; Carlos Urrea, currea2@unl.edu; Gary Hein, ghein@unlnotes.unl.edu; Gary Hergert, ghergert@unlnotes.unl.edu; and Bob Harveson, rharveso@unlnotes.unl.edu, Panhandle Research and Extension Center 
Description Crop management workshops are designed to assist the industry in gaining knowledge in production of crops grown in the Panhandle of Nebraska. Regional insurance adjusters from the High Plains region will be given training on dry edible bean production over a two day period in the following areas: effect of plant water stress, growth and development, soil compaction, harvesting, herbicide carryover, impact of drought, insect damage, nutrient requirements, disease management, crop adjustment procedures and quality adjustment factors.
Project Support National Crop Insurance Service
Project Website
Report
Current Status Completed
Topic Sandhills Studies and Modeling
Project's Primary Contact Information
Name Zlotnik, Vitaly
Unit Earth and Atmospheric Sciences
Email vzlotnik1@unl.edu
Phone 402-472-2495
Web Page http://eas.unl.edu/people/faculty_page.php?lastname=Zlotnik&firstname=Vitaly&type=REG
Project Information
Title Variability in Lake Salinity in the Sand Hills
Other(s) John Lenters, School of Natural Resources, jlenters2@unl.edu; Collaborating institutions: Indiana University, Oklahoma State University, U.S. Geological Survey 
Description

This research explores variability in lake salinity in the Sand Hills, which is the largest vegetated sand dune field in the western hemisphere. Numerous lakes occur in topographic depressions under west-east regional groundwater flow. In Sheridan and Garden counties alone there are approximately 400 lakes with surface areas larger than 4 hectare. The concentration of total dissolved solids in lake water ranges from fresh to very saline (three times higher than the ocean salinity). At the same time, the groundwater is fresh. Although several hypotheses are available, causes of wide salinity variations within this large area have not been determined conclusively. Geographically, this project is focused on Crescent Lake National Refuge area and the vicinities.

Understanding salinization mechanisms will explain climate effects on lake salinity and the potential for their existence in the Sand Hills. In addition, results can be utilized for detection and prediction of the consequences of deposition of saline or contaminated water over shallow freshwater aquifers in environmental disasters, such as hurricanes (e.g., Mississippi and Louisiana, U.S., 2005), tsunamis (e.g., Indonesia, Bangladesh in 2005), and large-scale land salinization (e.g., Murray Basin, Australia).

Project Support National Science Foundation
Project Website
Report Sandhills_Salinity_Final_Report.pdf
Current Status Completed
Topic Wildlife
Project's Primary Contact Information
Name Young, Chelsey
Unit Biology, UNK
Email youngca2@unk.edu
Phone 507-469-8284
Web Page
Project Information
Title A range-wide assessment of plains topminnow (Fundulus sciadicus) distribution and potential threats
Other(s) W. Wyatt Hoback, Biology UNK, hobackww@unk.edu; Keith Koupal, Biology UNK; Justin Haas 
Description The plains topminnow, Fundulus sciadicus, was once distributed from the Mississippi River to the Rocky Mountains, north to South Dakota and as far south as Oklahoma. Two centers of distribution are recognized. One is centered in Nebraska and the second is centered in Missouri. The geographic range of plains topminnow has decreased in the past decades. Plains topminnow are now considered a species of special concern in the state of Nebraska and listed as a Tier 1 species in the Nebraska Natural Legacy Project. Elimination of plains topminnow populations has been associated with introduction of invasive species, as well as loss of backwater habitats due to drought and lowered water tables. The objective of this project is to provide an updated assessment of plains topminnow distribution and population status as compared to all available historical records. Between 2004 and the present, sampling of plains topminnow revealed that in Nebraska 77% of historic Nebraska sites no longer contain plains topminnow populations. The sampling of remaining historic sites in Nebraska and neighboring states will continue in the 2009 sampling season.
Project Support n/a
Project Website
Report topminnow_range_reduction.pdf
Current Status Completed