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Browse by Author: Robert Evans
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Soil, Water and Crop Characteristics Important to Irrigation Scheduling

By: Robert Evans, Donald Cassel, R.E. Sneed

This publication presents basic information on factors (veil, water and plant relationships) to be considered in developing an effective irrigation schedule.

Measuring Soil Water for Irrigation Scheduling: Monitoring Methods and Devices

By: Robert Evans, Donald Cassel, R.E. Sneed

This publication provides information you will need for measuring soil water: types of soil-water measuring devices, how to select the right measuring device and how to prepare and install these devices.

Selection and Management of Efficient Self-propelled Gun Traveler Irrigation System

By: Robert Evans, R.E. Sneed

The self-propelled gun type traveler system is usually the most practical system for irrigating irregular shaped fields. Selection and management considerations for self-propelled gun type systems are discussed in this article.

Stationary Sprinkler Irrigation System

By: Robert Evans, Ronald E. Sneed, Ron E. Sheffield, Jonathan Smith Irrigated Acreage Determination Procedures for Wastewater Application Equipment

This publication contains step-by-step guidelines for determining irrigated acreage of stationary sprinkler irrigation systems.

SDI Considerations for North Carolina Growers and Producers

By: Garry Grabow, Robert Evans, Michael Dukes, Dorota Haman, Kerry Harrison, Ahmad Khalilian, W. Bryan Smith, David Ross, Phil Tacker, Daniel L. Thomas, Ronald B. Sorensen, Earl Vories, Heping Zhu Subsurface Drip Irrigation

Subsurface drip irrigation (SDI) is the practice of installing drip irrigation below the ground. SDI may be used below planting and tillage operations even in standard row-crop production systems. This publication is the first in a series that examines how North Carolina growers can use the technology.

Operating Controlled Drainage and Subirrigation Systems

By: Robert Evans, Wayne Skaggs

This publication summarizes design considerations, system operations and information on monitoring controlled drainage and subirrigation systems.

Water Supplies for Subirrigation

By: Robert Evans, Ronald E. Sneed, Wayne Skaggs

This publication explains how to plan and maintain subirrigation systems by providing information on types of water supplies and pumps and water quality.

Hard Hose and Cable Tow Traveler Irrigation Systems

By: Robert Evans, J.C. Barker, Jonathan Smith, R.E. Sheffield Field Calibration Procedures for Animal Wastewater Irrigation Equipment

This publication contains step-by-step guidelines for field calibration of hard hose and cable tow irrigation systems. Proper calibration is required by law.

Wetlands and Water Quality

By: Robert Evans, J.W. Gilliam, J.P. Lilly Water Quality & Waste Management

This factsheet explains how wetlands type and location influence water quality, and it reviews the cases for development or preservation.

Selection and Mangement of Efficient Low Volume Irrigation System

By: Robert Evans, J.W. Gilliam, Wayne Skaggs

North Carolina farmers grow crops on over 2 million acres of poorly drained soils. These fields represent nearly 40 percent of the state's cropland. This publication offers information on controlled drainage management guidelines for improving drainage water quality.

Stationary Sprinkler Irrigation System

By: Robert Evans, J.C. Barker, Jonathan Smith, R.E. Sheffield Field Calibration Procedures for Animal Wastewater Irrigation Equipment

This publication contains step-by-step guidelines for field calibration of stationary sprinkler irrigation systems. Proper calibration is required by law.

Selection and Management of Efficient Center-Pivot and Linear Move Irrigation Systems

By: Robert Evans, R.E. Sneed

The center pivot and linear-move type irrigation systems are usually the most practical system for irrigating large, rectangular or regular shaped fields. Selection and management considerations for center pivot and linear-move type systems are discussed in this article.

Economics of Controlled Drainage and Subirrigation Systems

By: Robert Evans, Wayne Skaggs, Ronald E. Sneed

Before installing a dual-purpose subsurface drainage and subirrigation system on your farm, have your site evaluated by the local Soil Conservation Service (SCS) to determine whether this option is suitable for your farm and your needs. If your site is found to be physically suitable, this publication will help you determine whether installing this type of system will be a wise investment.

Stormwater Wetlands for Golf Courses

By: Kris Bass, Mike Burchell, Robert Evans, Bill Hunt, Daniel Line, Danesha Seth Carley

Golf courses provide a unique setting for wetlands that can be used to provide both an environmental benefit and an aesthetic amenity. The research-based recommendations in this publication are intended to help you optimize concepts and designs for your next project.

Irrigation Scheduling to Improve Water and Energy-Use Efficiency

By: Robert Evans, Donald Cassel, R.E. Sneed

This publication explains how you can make the most efficient use of water and energy by applying the right amount of water to cropland at the right time.

Irrigation Management Strategies to Improve Water and Energy-Use Efficiencies

By: Robert Evans, Donald Cassel, R.E. Sneed

This publication discusses irrigation decisions that affect water and energy efficiencies.

Controlled Drainage Management Guidelines for Improving Drainage Water Quality

By: Robert Evans, J.W. Gilliam, Wayne Skaggs

This publication explains how future agricultural practices must be designed and managed to protect water quality.

Center Pivot and Linear Move Irrigation System

By: Robert Evans, J.C. Barker, Jonathan Smith, R.E. Sheffield Field Calibration Procedures for Animal Wastewater Irrigation Equipment

This publication contains step-by-step guidelines for field calibration of center pivot and linear move irrigation systems. Proper calibration is required by law.

Weight-Area Method Spreader System

By: Robert Evans, J.C. Barker, David Crouse Field Calibration Procedures for Solid and Semi-Solid Animal Waste Application Equipment

This publication explains the weight-area method, one of the two methods in which solid or semi-solid applicators can be calibrated. Proper calibration is required by law.

Load-Area Method Spreader System

By: Robert Evans, J.C. Barker, David Crouse Field Calibration Procedures for Semi-Solid Animal Waste Application Equipment

This publication explains the load-area method, one of the two methods in which semi-solid animal waste applicators can be calibrated. Proper calibration is required by law.

Critical Management Issues for SDI Systems in North Carolina

By: Garry Grabow, Dorota Z. Harman, Ronald B. Sorenson, David S. Ross, Robert Evans, Phil Tacker Subsurface Drip Irrigation

Although subsurface drip irrigation (SDI) is in its infancy in North Carolina, it is becoming more popular as growers learn of its many benefits, which include increased irrigation efficiency. Proper management is imperative with an SDI system. Many components of an SDI system are underground; therefore, you must carefully monitor pressure and flow rates to ensure that the system is operating properly. This publication addresses water management, chemigation, system management and maintenance, and system evaluation.

Stationary and Traveling Irrigation Systems

By: Garry Grabow, Robert Evans Calibration and Uniformity Assessment for Animal Wastewater Application Equipment

This publication explains calibration procedures for stationary and hard-hose traveler irrigation systems and how to determine acceptable application uniformity for the systems as established by the ninth and latest edition of the SB 1217 document (North Carolina 1217 Interagency Group, 2009). It does not invalidate the procedures (commonly referred to as the “catch can” method) described in AG-553-1 and AG-553-2 if operators want to use those for uniformity assessment. However, AG 553-1 and AG 553-2 do not fulfill the flow measurement calibration requirements currently established by the ninth edition of the SB 1217 document.

Calibrating Soil-Water Measuring Devices

By: Robert Evans, Donald Cassel, Ronald E. Sneed

This publication provides a step-by-step description of how to use the gravimetric method to calibrate soil-water measuring equipment.

Selection and Management of Efficient Hand-Move Solid Set and Permanent Irrigation System

By: Robert Evans, R.E. Sneed

Hand-move irrigation systems are normally used to irrigate small fields. Solid-set and permanent sprinkler irrigation systems are used for irrigation, frost/freeze protection, evaporative cooling, and land application of nutrient-rich effluent. Selection and management considerations for hand-move solid-set and permanent sprinkler irrigation systems are discussed in this article.

Selection and Management of Efficient Low Volume Irrigation System

By: Robert Evans, R.E. Sneed

Low volume irrigation systems are normally used for fruits, vegetables, container nursery plants and in the landscape. For all these uses, growers are interested in highly controlled water management systems. Selection and management considerations for low volume irrigation systems are discussed in this article.

Pumping Plant Performance

By: Robert Evans, R.E. Sneed, J.H. Hunt

This publication discusses the causes of poor irrigation system performance. Some of these causes can be identified and corrected by the irrigator. Others require specialized evaluation equipment, and the corrections should therefore be performed by specially trained technicians.

Hard Hose Traveler Irrigation System

By: Robert Evans, Ronald E. Sneed, Jonathan Smith, Ron Sheffield Irrigated Acreage Determination Procedures for Wastewater Application Equipment

This publication contains step-by-step guidelines for determining irrigated acreage for hard hose traveler irrigation systems are presented. Proper calibration helps protect the environment and is required by law.

Riparian Buffers and Controlled Drainage to Reduce Agricultural Nonpoint Source Pollution

By: Deanna Osmond, J. Wendell Gilliam, Robert Evans

This technical bulletin discusses riparian buffers and controlled drainage as best practices to reduce nonpoint (diffuse runoff) water pollution in North Carolina's basins. The article covers in-depth explanations of riparian buffers and controlled drainage; designs, how they work to protect stream health and reduce nitrogen and pesticides. Recommendations for best practices are provided for the coastal plain, lower coastal plain and Tidewater, middle and upper coastal plain, Piedmont and mountain regions. A glossary of terms is included.

Offsetting Drought for Small-Scale Vegetable Production in North Carolina

By: Jeanine Davis, Robert Evans, Garry Grabow, Bill Jester, Billy Little, Allan Thornton, Jonathan Schultheis

A good source of water is a necessity for producing quality vegetables. During periods of drought, crop diversification and mulches can be used to cope with drought situations, but nothing will substitute for the timely application of water. This publication covers some guidelines for irrigation systems to help offset periods of drought in the Southeast United States.

Agricultural Water Management for Coastal Plain Soils

By: Robert Evans, Wayne Skaggs

This fact sheet describes management strategies designed to conserve and use existing water resources more efficiently in coastal plain soils.

Irrigation Scheduling to Achieve Proper Application of Wastewater

By: Robert Evans, Karl Shaffer, R.E. Sheffield, Jonathan Smith

This publication provides guidelines and recommendations for proper irrigation scheduling of wastewater.

Rural Land Use, Water Movement & Coastal Water Quality

By: Robert Evans, J. Paul Lilly, R. Wayne Skaggs, J. Wendell Gilliam

This publication will help you understand hydrology (the movement of water above and below ground) and how it influences the effectiveness of management practices aimed at improving coastal water quality.