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Alternative Cropping Systems With Limited Irrigation, A. Schlegel 2016 Kansas State University

Alternative Cropping Systems With Limited Irrigation, A. Schlegel

Kansas Agricultural Experiment Station Research Reports

A limited irrigation study involving six cropping systems was initiated at the Southwest Research-Extension Center near Tribune, KS, in 2012. The cropping systems were two annual systems (continuous corn [C-C] and continuous grain sorghum [GS-GS]) and four 2-year systems (corn-sorghum [C-GS]), corn-sunflower [C-SF], corn-winter wheat [C-W], and corn-wheat/double sunflower [C-W/SF]). In 2015, corn yields were lower following corn than other crops while wheat and grain sorghum yields were similar for all rotations. This tended to agree with the 3-year average yields except for average sorghum yields being higher following corn than sorghum. Sunflowers were destroyed by rodents and ...


Response Of Drought Tolerant And Conventional Corn To Limited Irrigation, I. Kisekka, F. Lamm 2016 Kansas State University

Response Of Drought Tolerant And Conventional Corn To Limited Irrigation, I. Kisekka, F. Lamm

Kansas Agricultural Experiment Station Research Reports

The purpose of this study was to evaluate the response of two commercial hybrids (DKC 62-27 DGVT2PRO [drought tolerant trait (DT)] and DKC 62-98 VT2PRO [conventional]) to limited irrigation. Preliminary results from the 2014 and 2015 growing seasons at Southwest Research-Extension Center near Garden City, Kansas, indicate the effect of irrigation capacity on corn yield was significant (P < 0.001) for both hybrids. The effect of the drought tolerance trait on yield was not significant (P > 0.05) in both years. The effect of the interaction between irrigation capacity and corn hybrid on yield was also not significant (P > 0.05). Hybrid ...


Mobile Drip Irrigation Evaluation In Corn, I. Kisekka, T. Oker, G. Nguyen, J. Aguilar, D. Rogers 2016 Kansas State University

Mobile Drip Irrigation Evaluation In Corn, I. Kisekka, T. Oker, G. Nguyen, J. Aguilar, D. Rogers

Kansas Agricultural Experiment Station Research Reports

Mobile Drip Irrigation (MDI) involves attaching driplines to center pivot drops. MDI has potential to eliminate water losses due to spray droplet evaporation, water evapo­ration from the canopy, and wind drift. MDI also may reduce soil water evaporation due to limited surface wetting. A study was conducted with the following objectives: 1) compare soil water evaporation under MDI and in-canopy spray nozzles; 2) evalu­ate soil water redistribution under MDI at 60 inch dripline lateral spacing; 3) compare corn grain yield, water productivity, and irrigation water use efficiency; and 4) compare end-of-season profile soil water under MDI and in-canopy ...


Sorghum Yield Response To Water Supply And Irrigation Management, I. Kisekka, F. Lamm, A. Schlegel 2016 Kansas State University

Sorghum Yield Response To Water Supply And Irrigation Management, I. Kisekka, F. Lamm, A. Schlegel

Kansas Agricultural Experiment Station Research Reports

Grain sorghum yield, under full and limited irrigation, was evaluated at three locations in western Kansas (Colby, Tribune, and Garden City). The top-end yield under full ir­rigation was 190 bu/a. However, there were no significant differences among irrigation treatments at all the three locations due to the above normal rainfall received during the 2015 growing season. These preliminary results indicate that there is potential to improve grain sorghum yields under limited irrigation. Additionally, best management practices to maximize kernels per head could have the greatest effect on grain yields.


Forage Sorghum And Corn Silage Response To Full And Deficit Irrigation, I. Kisekka, J. D. Holman, J. W. Waggoner, J. Aguilar, R. Currie 2016 Kansas State University

Forage Sorghum And Corn Silage Response To Full And Deficit Irrigation, I. Kisekka, J. D. Holman, J. W. Waggoner, J. Aguilar, R. Currie

Kansas Agricultural Experiment Station Research Reports

There is limited information on forage sorghum and corn silage yield response to full and deficit irrigation in Kansas. The objective of this study was to generate information on forage sorghum (brown mid-rib hybrids (BMR and non-BMR)) and corn silage yield response to different levels of irrigation as influenced by irrigation capacity in southwest Kansas. Preliminary results indicate the effect of irrigation capacity on forage yield was significant (P = 0.0009) in 2014 but not 2015, probably due to high growing season rainfall received in 2015. Corn silage produced significantly (p < 0.05) higher biomass at all irrigation capacities compared to forage sorghum hybrids in 2015. BMR forage sorghum produced significantly lower biomass compared to non-BMR hybrid in both 2014 and 2015 (P < 0.05). The highest amounts of forage produced for corn silage, BMR, and non-BMR forage sorghum were 24.6, 17.4, and 21.1 tons/a adjusted to 65%, moisture respectively. Water productivity ranged from 1.0 to 1.4 dry matter tons/a/in. More research is needed under normal and dry years to quantify forage sorghum and corn silage yield and forage quality response to full and deficit irrigation.


Portland-Vancouver Ultra-Ex: Evaluating Relationships Between Governance And Environmental Quality In Urban Ecosystems, J. Alan Yeakley, Sally Duncan, Steve Bollens, Connie P. Ozawa, Vivek Shandas, Heejun Chang, Marion Dresner, Sean N. Gordon, John A. Harrison, Jeffrey D. Kline, Anita T. Morzillo, Noelwah R. Netusil, Gretchen Rollwagen-Bollens, Mark Stephan, Paul R. Thiers 2016 Portland State University

Portland-Vancouver Ultra-Ex: Evaluating Relationships Between Governance And Environmental Quality In Urban Ecosystems, J. Alan Yeakley, Sally Duncan, Steve Bollens, Connie P. Ozawa, Vivek Shandas, Heejun Chang, Marion Dresner, Sean N. Gordon, John A. Harrison, Jeffrey D. Kline, Anita T. Morzillo, Noelwah R. Netusil, Gretchen Rollwagen-Bollens, Mark Stephan, Paul R. Thiers

J. Alan Yeakley

The Portland-Vancouver Urban Long Term Research Area (ULTRA-Ex) is a multidisciplinary project aimed at understanding the feedbacks between human and natural systems in urban settings. The ULTRA-Ex project is seeking to answer the overarching question: How do human governance and biophysical systems respond interactively to both press and pulse disturbances in urban socio-ecological systems?

This presentation provides early observations and findings from the PV ULTRA-Ex project.


Investigating Opportunities For Enhancing Farmer Adoption Of Strategically Targeted Prairie Strips In Iowa, J. Gordon Arbuckle R., Drake Larsen, Tricia G. Knoot, John Tyndall, Emily Sorensen 2016 arbuckle@iastate.edu

Investigating Opportunities For Enhancing Farmer Adoption Of Strategically Targeted Prairie Strips In Iowa, J. Gordon Arbuckle R., Drake Larsen, Tricia G. Knoot, John Tyndall, Emily Sorensen

J. Gordon Arbuckle

Project researchers conducted in-depth interviews with a broad range of stakeholders from state agricultural and environmental groups and agencies. The research identified perceived barriers to adoption and gained stakeholder feedback on practical steps that might be taken to surmount those barriers and broaden awareness of and support for the technology.


Farmer Perspectives On Ecosystems Service Management, Land Use Targeting And The Future Of Cornbelt Agriculture, John Tyndall, Tricia G. Knoot, Matt Helmers, Drake Larsen, J. Gordon Arbuckle Jr., Brian K. Gelder 2016 Iowa State University

Farmer Perspectives On Ecosystems Service Management, Land Use Targeting And The Future Of Cornbelt Agriculture, John Tyndall, Tricia G. Knoot, Matt Helmers, Drake Larsen, J. Gordon Arbuckle Jr., Brian K. Gelder

J. Gordon Arbuckle

The development and use of targeted conservation practices was the subject of modeling, interviews and support tools researched by the project investigators.


Water, Growth And The Endangered Species Act, Holly Doremus 2016 Selected Works

Water, Growth And The Endangered Species Act, Holly Doremus

Holly Doremus

24 pages.


Water, Growth And The Endangered Species Act, Holly Doremus 2016 Selected Works

Water, Growth And The Endangered Species Act, Holly Doremus

Holly Doremus

24 pages.


Ecosystem Structure And Function In Two Branches Of An Eastern Minnesota, Usa, Trout Stream, Daniel J. Hornbach, Mark Hove, Maya Agata, Ellen Albright, Emily Cavazos, Clara Friedman, Katja Jay, Emily Johnson, Kari Johnson, Anna Staudenmaier 2016 Macalester College

Ecosystem Structure And Function In Two Branches Of An Eastern Minnesota, Usa, Trout Stream, Daniel J. Hornbach, Mark Hove, Maya Agata, Ellen Albright, Emily Cavazos, Clara Friedman, Katja Jay, Emily Johnson, Kari Johnson, Anna Staudenmaier

Daniel J. Hornbach

No abstract provided.


Applications Of Time-Lapse Imagery For Monitoring And Illustrating Ecological Dynamics In A Water-Stressed System, Emma Brinley Buckley 2016 University of Nebraska-Lincoln

Applications Of Time-Lapse Imagery For Monitoring And Illustrating Ecological Dynamics In A Water-Stressed System, Emma Brinley Buckley

Dissertations & Theses in Natural Resources

Understanding and perceiving the natural world is a key part of management, policy, conservation, and inevitably for our future. Increased demand on natural resources has heightened the importance of documenting ecosystem changes, and knowledge-sharing to foster awareness. The advancement of digital technologies has improved the efficiency of passive monitoring, connectivity among systems, and expanded the potential for innovative and communicative approaches. From technological progression, time-lapse imagery has emerged a valuable tool to capture and depict natural systems. I sought to enhance our understanding of a water-stressed system by analyzing imagery, in addition to integrating images with data visualization to illustrate ...


Ecosystem Structure And Function In Two Branches Of An Eastern Minnesota, Usa, Trout Stream, Daniel J. Hornbach, Mark Hove, Maya Agata, Ellen Albright, Emily Cavazos, Clara Friedman, Katja Jay, Emily Johnson, Kari Johnson, Anna Staudenmaier 2016 Macalester College

Ecosystem Structure And Function In Two Branches Of An Eastern Minnesota, Usa, Trout Stream, Daniel J. Hornbach, Mark Hove, Maya Agata, Ellen Albright, Emily Cavazos, Clara Friedman, Katja Jay, Emily Johnson, Kari Johnson, Anna Staudenmaier

Faculty Publications

No abstract provided.


Impact Of Sludge Layer Geometry On The Hydraulic Performance Of A Waste Stabilization Pond, Faissal Romaric Ouedraogo 2016 University of South Florida

Impact Of Sludge Layer Geometry On The Hydraulic Performance Of A Waste Stabilization Pond, Faissal Romaric Ouedraogo

Graduate Theses and Dissertations

Improving the hydraulic performance of waste stabilization ponds (WSPs) is an important management strategy to not only ensure protection of public health and the environment, but also to maximize the potential reuse of valuable resources found in the treated effluent. To reuse effluent from WSPs, a better understanding of the factors that impact the hydraulic performance of the system is needed. One major factor determining the hydraulic performance of a WSP is sludge accumulation, which alters the volume of the pond.

In this study, computational fluid dynamics (CFD) analysis was applied to investigate the impact of sludge layer geometry on ...


The Snakehead War: Administrative Rule-Making And Legislative Strategies To Minimize Destruction By The Northern Snakehead, Joshua Rice 2016 College of William & Mary Law School

The Snakehead War: Administrative Rule-Making And Legislative Strategies To Minimize Destruction By The Northern Snakehead, Joshua Rice

William & Mary Environmental Law and Policy Review

No abstract provided.


Aransas Project V. Shaw: The Fifth Circuit’S Incorrect And Attenuated Proximate Cause Analysis On What Killed The Whooping Crane, Brian Reagan 2016 College of William & Mary Law School

Aransas Project V. Shaw: The Fifth Circuit’S Incorrect And Attenuated Proximate Cause Analysis On What Killed The Whooping Crane, Brian Reagan

William & Mary Environmental Law and Policy Review

No abstract provided.


Litigation Against Fracking Bans And Moratoriums In The United States: Exit, Voice And Loyalty, Christopher J. Hilson 2016 College of William & Mary Law School

Litigation Against Fracking Bans And Moratoriums In The United States: Exit, Voice And Loyalty, Christopher J. Hilson

William & Mary Environmental Law and Policy Review

A number of U.S. states, counties and municipalities have responded to the public health and environmental concerns surrounding fracking by imposing bans or moratoriums on unconventional oil and gas drilling. These restrictions have, in recent years, given rise to litigation challenges by oil and gas companies and by property owners deprived of potential revenues. The current Article begins by examining precisely who has litigated. Have large companies dominated or is it mostly smaller independents? Is there a difference in litigation rates between private and public companies? The Article then considers how Hirschman’s ideas of exit, voice and loyalty ...


Coercing Collaboration: The Chesapeake Bay Experience, Jamison E. Colburn 2016 College of William & Mary Law School

Coercing Collaboration: The Chesapeake Bay Experience, Jamison E. Colburn

William & Mary Environmental Law and Policy Review

This Article uses a detailed case study of the Chesapeake to describe an emergent model of intergovernmental administration tailored to address our largest-scale environmental problems. The Obama EPA’s “total maximum daily load” (“TMDL”) in the Chesapeake has yet to be replicated. But it should be. The TMDL and its supporting norms were unique as an operational plan, achieving a level of transparency, accountability, means/ends rationality, and continuous improvement that were unprecedented at its scale. And whether this model can be replicated elsewhere turns out to be as much a question of law as of politics.


An Architectural Overview Of Hydroshare, A Next-Generation Hydrologic Information System, Jefferson Heard, David G. Tarboton, Ray Idaszak, Jeffery S. Horsburgh, Dan Ames, Alex Bedig, Anthony M. Castronova, Alva Couch 2016 Selected Works

An Architectural Overview Of Hydroshare, A Next-Generation Hydrologic Information System, Jefferson Heard, David G. Tarboton, Ray Idaszak, Jeffery S. Horsburgh, Dan Ames, Alex Bedig, Anthony M. Castronova, Alva Couch

Jeffery Horsburgh

HydroShare is an online, open-source, collaborative system being developed for sharing hydrologic data and models as part of the NSF’s Software Infrastructure for Sustained Innovation (SI2) program. The goal of HydroShare is to enable scientists to easily discover and access hydrologic data and models, retrieve them to their desktop, or perform analyses in a distributed computing environment that may include grid, cloud, or high performance computing. Scientists may also publish outcomes (data, results or models) into HydroShare, using the system as a collaboration platform for sharing data, models, and analyses. HydroShare involves a large distributed software development effort requiring ...


Odm Tools Python: Open Source Software For Managing Continuous Sensor Data, Jeffery S. Horsburgh, Stephanie Reeder, Amber Spackman Jones 2016 Selected Works

Odm Tools Python: Open Source Software For Managing Continuous Sensor Data, Jeffery S. Horsburgh, Stephanie Reeder, Amber Spackman Jones

Jeffery Horsburgh

Hydrologic and water quality data is being collected at high frequencies, for extended durations, and with spatial distributions that require infrastructure for data storage and management. The Observations Data Model (ODM), which is part of the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) Hydrologic Information System (HIS), was developed as a framework in which to organize, store, and describe point observations data. In this paper we describe ODM Tools Python, which is an open source software application that allows ODM users to query and export, visualize, and edit data stored in an ODM database. Previous versions ...


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