Curriculum and Instruction Commons^™

Supporting 3rd-Grade Students’ Model-Based Explanations About Groundwater: A Quasi-Experimental Study Of A Curricular Intervention, Laura Zangori, Tina Vo, Cory Forbes, Christina V. Schwarz

Department of Teaching, Learning, and Teacher Education: Faculty Publications

Scientific modelling is a key practice in which K-12 students should engage to begin developing robust conceptual understanding of natural systems, including water. However, little past research has explored primary students’ learning about groundwater, engagement in scientific modelling, and/or the ways in which teachers conceptualize and cultivate model-based science learning environments. We are engaged in a multi-year project designed to support 3rd-grade students’ formulation of model-based explanations (MBE) for hydrologic phenomenon, including groundwater, through curricular and instructional support. In this quasi-experimental comparative study of five 3rd-grade classrooms, we present findings from analysis of students’ MBE generated as part of experiencing …

Ec81-1240 Vegetable Gardening In Nebraska, Dale T. Lindgren, Laurie Hodges, Don Steinegger, Ralph E. Neild

Laurie Hodges

Nebraskans are increasing their consumption of fresh vegetables — as appetizers, salads, side dishes, and snacks. Fresh vegetables are an integral part of a healthy, well-balanced diet. Although Nebraska's climate and soil are well-suited for many vegetables, most are supplied from out of the state, even during summer. Growing fresh vegetables can provide higher nutrition and flavor at less expense than buying fresh produce at the grocery store. A garden also can be a source of personal enjoyment and satisfaction. This extension circular helps the gardener decide when, where, and how to plant and maintain a vegetable garden.

G80-496 Tomatoes In The Home Garden, Laurie Hodges, Dale T. Lindgren, Susan Schoneweis

Laurie Hodges

This NebGuide outlines tomato rearing practices, cultivars and possible pest, disease and weed control problems.

Tomatoes come in a wide range of fruit colors, sizes, shapes and maturities. Ripe tomatoes may be red, yellow, orange, pink or even green. Shapes vary from globe or round to slightly flattened, pear-like or cherry-sized. Often consumers complain tomatoes purchased in grocery stores are lacking in flavor or have tough skin. In a home garden, you can grow the tomatoes you prefer, including a wide selection of fruit colors, flavors, textures and sizes. Although rumored, there is no direct link between fruit acidity and …

Imaginative Science Education: Exploring The Wonders Of Water, Emily R. Fletcher

Graduate Student Independent Studies

The imagination is central to all learning. This paper provides science educators with a better understanding of imagination's role in learning and how it may be routinely engaged in the education of budding scientists. Both theoretical and practical dimensions are addressed. Part one defines the imagination, provides an overview of Kieran Egan's (1997) theory of lmaginative Education, introduces Egan's framework for developing lessons using Imaginative Education, and provides an argument for imaginative science education. Part two provides an example of science curriculum that shows practical application of lmaginative Education in a museum science camp setting. The curriculum explores the scientific …

G08-1489 Drinking Water Treatment: Activated Carbon Filtration, Bruce I. Dvorak, Sharon Skipton

University of Nebraska-Lincoln Extension: Historical Materials

Activated carbon filtration can effectively reduce certain organic compounds and chlorine in drinking water. It can also reduce the quantity of lead, dissolved radon, and harmless taste- and odor-causing compounds. This 2008 NebGuide discusses the principles, processes, and requirements of activated carbon filtration systems for the domestic (household) user.

G08-1490 Drinking Water Treatment: Reverse Osmosis, Bruce I. Dvorak, Sharon Skipton

University of Nebraska-Lincoln Extension: Historical Materials

Homeowners can find out more about reverse osmosis (RO) in this 2008 guide, which discusses the principles and process of RO treatment for household drinking water.

Ec08-1488 Drinking Water Treatment: What You Need To Know When Selecting Water Treatment Equipment, Sharon Skipton, Bruce I. Dvorak, Shirley Niemeyer

University of Nebraska-Lincoln Extension: Historical Materials

This 2008 NebGuide explores household water quality and treatment options and can help consumers select a treatment system suited to a particular situation.

G08-1376 Drinking Water: Fluoride, Sharon Skipton, Bruce I. Dvorak, Wayne Woldt, Andy Kahle

University of Nebraska-Lincoln Extension: Historical Materials

At optimal levels, fluoride in drinking water can be beneficial to dental health. Learn more about fluoride concentration and potential health effects in this 2008 NebGuide.

G08-1614 Drinking Water: Certified Water Testing Laboratories In Nebraska, Sharon Skipton, Bruce I. Dvorak, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

This 2008 NebGuide explains the certification process water testing laboratories follow, and lists certified government and commercial operated laboratories.

G08-1493 Drinking Water Treatment: Distillation, Bruce I. Dvorak, Sharon Skipton

University of Nebraska-Lincoln Extension: Historical Materials

Homeowners are increasingly concerned about contaminants in their water supply that may affect health or cause taste, odor, or nuisance problems. Distillation, one of the oldest methods of water treatment, is an effective method for reducing many impurities found in water. This 2008 NebGuide discusses the process and related equipment used for household drinking water treatment by distillation.

G08-1492 Drinking Water Treatment: Sediment Filtration, Bruce I. Dvorak, Sharon Skipton

University of Nebraska-Lincoln Extension: Historical Materials

Sediment filters remove suspended matter such as sand, silt, loose scale, clay or organic material from the water. Untreated water passes through a filter medium which traps suspended matter on the surface or within the filter. This 2008 NebGuide discusses the principles, processes, and requirements of cartridge sediment filtration systems for the household user.

G08-1784 Drinking Water: Nitrate-Nitrogen, Sharon Skipton, Wayne Woldt, Bruce I. Dvorak, Ralph Pulte

University of Nebraska-Lincoln Extension: Historical Materials

Nitrate-nitrogen is sometimes present in drinking water. At certain levels it can present a health risk. Properly locating and constructing wells along with regularly testing can help manage risk and are discussed in this 2008 NebGuide.

G07-1704 Chloramines Water Disinfection: Omaha Metropolitan Utilities District And Lincoln Water System, Sharon Skipton, Bruce I. Dvorak

University of Nebraska-Lincoln Extension: Historical Materials

Bacteria and other disease-causing organisms in drinking water can cause intestinal infections, dysentery and a variety of other illnesses. Water disinfection reduces disease-causing organisms and prevents the transmission of disease. This 2007 NebGuide discusses the disinfection process used by the Omaha Metropolitan Utilities District and Lincoln Water System.

G07-1756 Fine-Tuning A Sprayer With The "Ounce" Calibration Method, Robert N. Klein

University of Nebraska-Lincoln Extension: Historical Materials

This 2007 NebGuide discusses guidelines to quickly evaluate the performance of a spryayer. Sprayer calibration, nozzle discharge and speed checks are evaluated with minimal calculations.

Ec06-783 Watermark Granular Matrix Sensor To Measure Soil Matric Potential For Irrigation Management, Suat Irmak, Jose O. Payero, Dean E. Eisenhauer, William L. Kranz, Derrel Martin, Gary L. Zoubek, Jennifer M. Rees, Brandy Vandewalle, Andrew P. Christiansen, Dan Leininger

University of Nebraska-Lincoln Extension: Historical Materials

This 2006 Extension Circular defines soil matric potential and describes principles and operational characteristics of one of the electrical resistance type soil moisture sensors for irrigation management. Examples show how soil matric potential can be used for irrigation management.

G06-1622 Soybean Inoculation: Applying The Facts To Your Fields (Part Two Of A Two-Part Series), Lori J. Abendroth, Roger Wesley Elmore, Richard B. Ferguson

University of Nebraska-Lincoln Extension: Historical Materials

Why is it that we see soybean yield responses from inoculating with Bradyrhizobia japonicum in some cases but not others?

This publication explains how to distinguish which fields will likely respond to inoculation with B. japonicum from those that will not. Fields are designated as either "new" or "old" based on how often soybean is grown. This designation is one criterion among many in deciding when to inoculate. In general, research trials across multiple locations in Nebraska have shown no yield advantage to re-inoculation.

Nf05-632 Protecting Your Watershed, Thomas G. Franti, Steven R. Tonn

University of Nebraska-Lincoln Extension: Historical Materials

Everyone lives in a watershed. A watershed is the land area that contributes water to a location, usually a stream, pond, lake or river. Everything we do on the suface of our watershed impacts the water quality of our streams, wetlands, ponds, lakes and rivers. Like organs in a body, every part of the watershed is essential. What happens in one part affects other downstream parts. This NebFacts discusses the threat of pollutions in our watersheds, common runoff pollutants, and best management practices for protecting the watershed.

Nf05-631 Understanding Watersheds, Thomas G. Franti, Steven R. Tonn

University of Nebraska-Lincoln Extension: Historical Materials

Watersheds are dynamic and unique places. They are complex webs of natural resources, — soil, water, air, plants and animals. Together land and water make a watershed a whole system.

This NebFacts covers what a watershed is, how it works, its functions, how human activities can alter watershed functions, and its management.

Ec05-705 Precision Agriculture: Site-Specific Of Soil Ph (Faq), Viacheslav I. Adamchuk, Jerry Mulliken

University of Nebraska-Lincoln Extension: Historical Materials

Site-specific management of soil pH is a precision agriculture practice that can provide positive economic and environmental impacts on modern crop production. This publication addresses several frequently asked questions related to the meaning of soil pH, lime requirement, and quality of data used to prescribe site-specific management of soil pH. What is soil pH? The term “pH” is defined as the negative logarithm of the hydrogen ion activity, and values range from 1 (very acidic) to 14 (very basic).

G05-1551 Multiple-Year Droughts In Nebraska, Michael Hayes, Cody Knutson, Q. Steven Hu

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the history and impact of drought in Nebraska.

Most people understand that droughts have had a major impact on Nebraska in the past. Yet, many Nebraskans continue to be surprised when drought occurs. It is important to remember that droughts, including multiple-year droughts, are a normal part of Nebraska’s climate. This NebGuide discusses the history of drought in Nebraska, and aims to help Nebraskans better understand the range of climatic variability when they plan for drought.

G05-1579 Using Modified Atmometers (EtGage®) For Irrigation Management, Suat Irmak, Jose O, Payero, Derrel L. Martin

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes the atmometer (evapotranspiration gage) and explains how it can be used for irrigation scheduling. Examlpes are provided to show how information collected with an atmometer can be used to estimate crop water use for corn and soybean.

G04-1536 Drinking Water: Storing An Emergency Supply, Sharon Skipton, Bruce I. Dvorak, Julie A. Albrecht

University of Nebraska-Lincoln Extension: Historical Materials

Taking a little time now to store an emergency water supply can prepare for all types of disasters. If your water supply is disrupted, you will be able to provide for your entire family and possibly others. Effective methods of preparing water for storage include disinfection with chlorine and storing at room temperature, disinfection with chlorine and freezing, or canning.

Cc03-431 Make Every Drop Count In Your Home

University of Nebraska-Lincoln Extension: Historical Materials

There are four ways to reduce water in your home ...

1. Maintain -- Fix leaks and dripping faucets. Leaks can account for 14 to 25 percent of all indoor water use.

2. Change -- Change the way water is used in the home.

3. Equipment -- Purchase water-reducing equipment and appliances.

4. Think -- Develop creative water conserving practices that are safe and sanitary.

Start wtih the largest water users. The toilet, shower/bath, and clothes washer account for two-thirds of the water used in an average household.

Cc03-432 Make Every Drop Count In Your Home On Your Yard

University of Nebraska-Lincoln Extension: Historical Materials

Did You Know...

Weather adjustments to an automatic irrigation system can conserve A LOT of water.

A system applying 1 inch of water to an average size lawn (approximately 5,000 square feet) that has already received sufficient rain wastes over 3,000 gallons of water -- a year's supply of drinking water for 17 people.

Nf02-507 Manure Testing: What To Request?, Charles A. Shapiro, Charles S. Wortmann, Richard Deloughery

University of Nebraska-Lincoln Extension: Historical Materials

Manure testing is necessary to make optimum use of manure while protecting water resources. The tests most frequently needed to optimize nutrient management are total and ammonium nitrogen, phosphorus, potassium, pH, soluble salts, sodium, and dry matter content. This NebFact is a guide to providing information on a Manure Sample Sub­mission Form for reliable interpretation of results.

Nf02-505 Drinking Water: Chloramines Waters Disinfection In Omaha Metropolitan Utilities District, Sharon Skipton, Bruce I. Dvorak

University of Nebraska-Lincoln Extension: Historical Materials

Bacteria and other disease-causing organisms in drinking water can cause intestinal infections, dysentery, and a variety of other illnesses. Water disinfection reduces disease-causing organisms and prevents the transmission of disease. This publication discusses the disinfection process used by Metropolitan Utilities District and how it will change in 2002.

Ec02-459 Heating And Cooling Systems: Saving Energy And Keeping Safe (Home*A*Syst Worksheet 1), Shirley Niemeyer, Sharon Skipton

University of Nebraska-Lincoln Extension: Historical Materials

Your house should be a safe, comfortable place that is affordable and durable. A house is affordable only when costs for heating and cooling are reasonable. Energy bills are lowest if a home is tightly air-sealed and pr0perly insulated and if all mechanical systems are operating efficiently.

This worksheet will help you assess the environment of your home. It will take you step-by-step through current home energy management practices and conditions. Evaluate activities and conditions according to how they might affect energy use and human health. Provide easy to understand "risk level scores" that will help the you analyze the …

Ec01-797 Filtration And Maintenance: Considerations For Subsurface Drip Irrigation (Sdi), Brian Benham, Jose O. Payero

University of Nebraska-Lincoln Extension: Historical Materials

When using Subsurface Drip Irrigation (SDI) systems, it is important to prevent clogging problems before they occur. The best prevention plan includes an effective filtration and water treatment strategy. Depending on the water source and its quality, various combinations of sand separation, filtration and chemical treatments may be required and are discussed here in this extension circular.

Ec01-158 Integrating Management Objectives And Grazing Strategies On Semi-Arid Rangeland, Patrick E. Reece, Jerry D. Volesky, Walter H. Schacht

University of Nebraska-Lincoln Extension: Historical Materials

Rangelands account for about half of Nebraska's total land area or about 24 million acres. Much of these expansive natural resource areas are in the semi-arid climatic region of Nebraska where grazing management decisions have a profound effect on ranch survival.

The educational object of this circular is to explain management practices that optimize the sustainability of rangeland-based enterprises. Additionally a decision-support tool is provided for selecting grazing systems best suited to livestock production and natural resource management objectives.

G01-1418 Turf In The Landscape (Revised April 2003), Anne Streich, Steven Rodie, Roch E. Gaussoin

University of Nebraska-Lincoln Extension: Historical Materials

To many people, landscape design means choosing the right tree, shrub or flower for a particular place. An important aspect of the landscape often overlooked, however, is the use of turf. Turf often becomes the leftover areas in the landscape rather than an integral design element.

Turf is a significant part of successful landscaping. This NebGuide explores the benefits and uses of turf in the landscape.