Life Sciences Commons^™

Project Oasis: Optimizing Aquaponic Systems To Improve Sustainability, Siddharth Nigam, Paige Balcom

Honors Theses and Capstones

Started in Fall 2015, Project OASIS (Optimizing Aquaponic Systems to Improve Sustainability) is an interdisciplinary capstone project with the goal of designing a sustainable and affordable small-scale aquaponic system for use in developing nations to tackle the problems of malnutrition and food insecurity. Aquaponics is a symbiotic relationship between fish and vegetables growing together in a recirculating system. The project’s goals were to minimize energy consumption and construction costs while using universally available materials. The computational fluid dynamics (CFD) software OpenFOAM was used to create transient and steady-state models of fish tanks to visualize velocity profiles, streamlines, and particle movement. …

The Transfer Of Agricultural Water To Municipal And Industrial Usages, Dallin Paul Stephens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The water that is available for beneficial use in Utah is quickly approaching full appropriation; water that has been claimed is nearing the amount that is available for use. The Division of Water Resources of the State of Utah has organized a three-part plan to "Plan, Conserve, Develop and Protect Utah's Water Resources." One of these three elements has a focus to "provide comprehensive water planning." Such planning is best achieved when current and accurate data on the uses of the state's water are available.

The primary purpose of this thesis was to provide an evaluation, from data collected on …

Ec97-781 Livestock Systems Environmental Assessment, Richard K. Koelsch

University of Nebraska-Lincoln Extension: Historical Materials

The goal of this assessment package is to help a livestock producer confidentially evaluate their stewardship of water and air resources. Protecting both the groundwater that supplies your drinking water and the surface waters that provide recreational opportunities is in the interests of every livestock producer. The worksheets will assist you in estimating the quantity of nutrients in the manure from your livestock; guide you through a step-by-step evaluation of your livestock system for possible impacts on water and air quality; and help you identify your operation's enviornmental strengths and weaknesses.

G95-1243 Ventilation Fans: Types And Sizes, Gerald R. Bodman, David P. Shelton

University of Nebraska-Lincoln Extension: Historical Materials

This publication describes the most common types of ventilation fans and compares their physical and performance characteristics.

Two general types of ventilation fans are commonly used for agricultural applications. Each type has many different blade diameters, materials, blade shapes, speeds, and motor horsepowers available. The desired airflow rate and the resistance to airflow through the ventilation system, or static pressure capabilities, are the two primary considerations when selecting a ventilation fan. Other considerations include maintenance requirements, noise levels, and energy efficiency.

G95-1135 Estimating Percent Residue Cover Using The Calculation Method, David P. Shelton, John A. Smith, Paul J. Jasa, Roger Kanable

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes how to use the calculation method to estimate the percent of the soil surface that will be covered with crop residue after using residue-disturbing implements and operations. Leaving crop residue on the soil surface is the easiest and most cost-effective method of reducing soil erosion. Research in Nebraska and other midwestern states found that leaving as little as 20 percent of the soil surface covered with crop residue can reduce soil erosion caused by rainfall and flowing water by one-half compared to residue-free conditions. Greater amounts of residue cover will further reduce erosion.

Ec91-734 Noise ... Sound Without Value (Tractor Sound Levels, 1970-1990), Rollin D. Schnieder

University of Nebraska-Lincoln Extension: Historical Materials

Oh, for the peace and quiet of the country. Surely you have heard this statement. How true this was in years gone by. Now, however, the country environment is often filled with the noise of thumping cylinders, and turning gears in modern tractors — noises previously associated with cities have moved into rural areas.

What do the words sound and noise mean? Some people refer to sound as something pleasant. For example, a number of tones placed together might result in a beautiful symphony. However, if these notes are played too loudly or off key, they might be referred to …

G90-983 Equipment Adjustments For Herbicide Incorporation, Robert Grisso, Elbert C. Dickey, Alex Martin

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses how to operate liquid herbicide application equipment on tillage implements.

Heightened concerns for energy and soil conservation have caused producers to reduce the number of secondary tillage operations while trying to maintain satisfactory incorporation of herbicides. Many herbicides are carried into the soil by rainfall or sprinkler irrigation and do not require mechanical incorporation. However, some soil-applied herbicides require mechanical incorporation to reduce volatility and photodecomposition losses. These are Eradicane, Sutan+ and Treflan.

G90-1001 Spray Drift Of Pesticides, Larry D. Schulze, Robert Grisso, Robert Stougaard

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses conditions that cause particle drift, and methods private and commercial applicators may employ to reduce drift potential from pesticide spray applications.

Spray drift of pesticides away from the target is an important and costly problem facing both commercial and private applicators. Drift causes many problems including:

1. damage to susceptible off target sites,

2. a lower rate than intended which can reduce the effectiveness of the pesticide, wasting pesticide and money, and

3. environmental contamination, such as water pollution and illegal pesticide residues.

Drift occurs by two methods; vapor drift and particle drift. This NebGuide focuses mainly …

The Effect Of Small Earth Structures And Channel Improvements On The Flooding Of Agricultural Land In South-Western Australia, J R. Davies, D J. Mcfarlane, R Ferdowsian

Resource management technical reports

No abstract provided.

Ec87-726 Mastitis Control Guidelines, Gerald R. Bodman, Duane N. Rice, Don J. Kubik

University of Nebraska-Lincoln Extension: Historical Materials

These mastitis control guidelines were prepared by UNL personnel based on current literature and experience with the Nebraska mastitis control program, the demonstration herds, and many on-site dairy farm evaluations. This information will help producers and others in the dairy industry to understand, establish and maintain a comprehensive mastitis control program. Recommendations and procedures presented in the guidelines will allow the producer to develop an effective mastitis control program. When the recommendations are coupled with a conscientious and dedicated attitude, the result will be less mastitis and more better-quality milk at a lower production cost.

Ec86-2103 Safe Tractor Operations, Rollin D. Schnieder

University of Nebraska-Lincoln Extension: Historical Materials

No one deliberately has a tractor accident. Nevertheless, every year many farmers are killed or injured on, or because of, their tractors.

The causes of such accidents show that improper operation of the tractor or equipment accounts for the greatest percentage of accidents. Improper operation includes excessive speed, operating under the influence of alcohol and chasing cattle. Other accident causes are driving on too steep an incline and inexperience or immature drivers.

This extension circular contains safety hints on how to operate your farm equipment.

G81-550 Ecofarming Operating High Capacity Sprayers (Floaters) For Herbicide Application, Gail A. Wicks, Charles R. Fenster, Norman L. Klocke

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide will help you determine whether you are covered by or exempt from the Worker Protection Standard and provide information on how to comply.

Many flotation sprayers are only used to spray fertilizers and herbicides in the spring. Ecofarming, however, represents a March to November market for them. Successful ecofarming requires precision spraying of herbicides on the winter wheat stubble, and offers tremendous opportunities for professional applicators. Commercial application eliminates some of the field work for the farmer, which is an important element for more efficient farming. The commercial applicator is also able to do a better job since …

G78-398 Irrigated Small Grain Production, Philip Grabouski, Walter Trimmer, Louis Daigger

University of Nebraska-Lincoln Extension: Historical Materials

Excellent management practices for irrigated small grains are necessary to obtain high yields. What varieties should I use? How should the seedbed be prepared? What row spacing is best? What plant nutrients are needed? How much fertilizer should I use? When should I apply the fertilizer? What is the water intake rate of my soil? How much will it hold? When is the best time to irrigate? These are some of the questions in the mind of the irrigated small grain producer and are answered in this NebGuide.

G73-31 Design And Construction Of Grain Bin Floors (Revised May 1979), Gerald R. Bodman, Thomas L. Thompson

University of Nebraska-Lincoln Extension: Historical Materials

The foundation and floor for a new or used grain bin performs several functions. In addition to supporting the grain and the bin, it protects the grain from moisture and rodents, prevents settlement of the bin, and anchors the bin. Good design and careful construction are necessary to assure that the bin will perform in a satisfactory manner. For efficient operation, a bin floor must be capable of serving as an integrated part of the total grain handling system.

50 Years Of Research At The North Platte Experiment Station, W. W. Burr, J. C. Adams

Nebraska Agricultural Experiment Station: Historical Circulars

The North Platte Experiment was established fifty years ago. So many changes have occurred since then that few people remember why research in dry land agriculture was started in Nebraska and other Great Plains states. In order to get a proper perspective, it may be well to consider some early history.

Fifty Years Of Achievement In Agricultural Investigation, R. T. Prescott

Nebraska Agricultural Experiment Station: Historical Circulars

In Nebraska, a hustling frontier state in 1887, the legislature hesitated not at all in taking advantage of the provisions of the Hatch Act, and now that fifty years have elapsed since the Station was founded, seventy-five years since the Land Grant College Act was passed and the U. S. Department of Agriculture established, and almost twenty-five years since the Agricultural Extension Service was added, it seems worth while to present a general summary of achievement within the state. The main object will be to show some of the important things that have been learned through the investigations of the …

Forty-Seventh Annual Report Of The Agricultural Experiment Station Of Nebraska February 1, 1934, W.W. Burr

Agricultural Research Division: News and Annual Reports

This report is for the most part a record of the achievements of the Nebraska Agricultural Experiment Station during the fiscal year ending June 30, 1933. The reports from the substations extend to January 1, 1934. A financial statement showing the receipts and expenditures of the Experiment Station is included.

The projects are grouped and discussed under subject headings. Little or no progress has been made on some projects, while others, on which attention has been concentrated, have been advanced rapidly or completed. Curtailment of appropriations and a reduction in cash funds due to the low prices of agricultural products …

Forty-Fifth Annual Report Of The Agricultural Experiment Station Of Nebraska, February 1, 1932, W.W. Burr

Agricultural Research Division: News and Annual Reports

This report covers the investigations, expenditures, and publications of the Nebraska Agricultural Experiment Station for the fiscal year June 30, 1931. During the year 68 projects have been under investigation at the main station. These have covered a wide range of subjects. At the various substations the work is planned to meet the needs of the different regions.

The funds for carrying on the work of the stations are derived from federal and state sources. The work is carried on in definite projects according to the supporting fund.

Satisfactory progress was made on the research program. During the year eight …

Rb32-266 Cooling Milk On Nebraska Farms, P.A. Downs, E.B. Lewis

University of Nebraska-Lincoln Extension: Historical Materials

The desire of Nebraska people to continue the improvement of living conditions and to secure more healthful foods has been responsible for many changes in methods of caring for milk. One of the important factors in keeping milk sweet and of good quality is the process of cooling and keeping it cool until used. Three of these processes are as follows: placing containers of warm milk in any quantity of still water or still air at temperatures ranging from freezing to within a few degrees of the temperature of the milk, placing the containers in such positions that air or …

List Of Available Publications, July 1, 1925, Nebraska Agricultural Experiment Station

Nebraska Agricultural Experiment Station: Historical Circulars

Publications of the Agricultural Experiment Station and the Agricultural Extension Service are sent free to all persons requesting them.

These Fifty Years: A History Of The College Of Agriculture Of The University Of Nebraska, R. P. Crawford

Nebraska Agricultural Experiment Station: Historical Circulars

It seems especially appropriate at this time to publish a history of the College of Agriculture of the University of Nebraska. The year 1922 marked the fiftieth anniversary of the formal establishment of the college by the Board of Regents, while the year 1924 marked the fiftieth anniversary of the enrollment of the first students in agricultural subjects. It is hoped and intended that this little volume shall preserve for the future much valuable material that would otherwise soon be forgotten.

Pump Irrigation In Nebraska, E. E. Brackett, O. W. Sjogren

Nebraska Agricultural Experiment Station: Historical Circulars

Before one decides to install a pumping plant for irrigating purposes there are a good many factors that should be considered regarding the feasibility of the project and the construction of the plant. The material contained in this bulletin has been obtained from studying pumping plants in actual operation in this and other states and from experience gained while installing plants in this state.