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Browse by Author: Garry Grabow
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Water Requirements of North Carolina Turfgrasses

By: Grady Miller, Drew Pinnix, Garry Grabow, Charles Peacock

Water is an essential component for plant growth. In turfgrasses it comprises 75 to 90 percent of the fresh weight of the plant, and irrigation is a key cultural practice in turfgrass management. Only 1 percent of the water absorbed is utilized for metabolic activity. By considering the factors that contribute to water loss, turfgrass managers can devise effective irrigation plans for specific sites.

Landscape Irrigation Auditing Made Simple

By: Garry Grabow, Grady Miller, Drew Pinnix

This publication discusses how to ensure efficient supplemental water management to maintain turfgrass growth by evaluating irrigation system performance. Completing an audit of an irrigation system provides the information needed to set irrigation controllers to deliver the proper amount of water.

Hose Drag Systems for Land Application of Liquid Manure and Wastewater

By: Garry Grabow, Karl Shaffer, Sanjay Shah

This publication describes hose drag systems and their operation as used to apply animal waste and wastewater in North Carolina.

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.

Design and Installation of SDI Systems in North Carolina

By: Garry Grabow, Kerry Harrison, Michael D. Dukes, Earl Vories, W. Bryan Smith, Heping Zhu, Ahmad Khalilian Subsurface Drip Irrigation

As a part of the humid Southeast, North Carolina’s climate, topography, soils, cropping systems, and water sources require special consideration when considering and implementing a subsurface drip irrigation (SDI) system. This publication is not a step-by-step design manual, but it will help you in the design process of an SDI system appropriate to North Carolina.

Site Selection for SDI Systems in North Carolina

By: Garry Grabow, Michael Dukes, Dorota Z. Haman, Freddie Lamm Subsurface Drip Irrigation

Subsurface drip irrigation (SDI) is a relatively new system that may give North Carolina producers similar or higher crop yields while using less water than other irrigation systems. Proper site selection helps ensure optimum system performance and crop yield while minimizing expenses. This publication will help you consider the characteristics of your field, soil, crop, cropping system and irrigation water resources as they apply to SDI.

Water Needs Assessment Tool—A Guide for Technical Specialists

By: Garry Grabow

This publication provides background information and references for the Water Needs Assessment Tool spreadsheet and its data inputs. It also discusses the methods used to generate output from the model and provides examples.

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.

Hose-Drag Wastewater Equipment

By: Garry Grabow, Karl Shaffer, Sanjay Shah Field Calibration Procedures for Animal Wastewater Irrigation Equipment

Hose-drag-type equipment has gained popularity in recent years for land application of wastewater in North Carolina. It offers several advantages over traditional irrigation systems including odor reduction, nitrogen conservation, and a relatively high flow rate that cuts the application time. This publication explains calibration procedures for the “low-profile-type” discharge system and a “boom-type” system.

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.

Poultry Waste Stockpiling Methods: Environmental Impacts and Their Mitigation

By: Sanjay Shah, Garry Grabow, Lingjuan Wang Li

Due to pollution concerns federal and state regulations and incentives (discussed in this publication) have been established to store poultry waste in a way that reduces pollution and minimizes nutrient losses and odors. Because poultry waste storage regulations vary among states, it is important to check whether a storage method (depending on duration of storage) is acceptable in a particular state.

Additives for Improving Hog Farm Air Quality

By: Sanjay Shah, Philip Westerman, Garry Grabow

Air quality in hog production can be improved by dietary manipulation (e.g., reducing crude protein), technology (spraying oil in the houses), management (regular washdown of pens), or additives. This paper focuses on additives used in shallow pits and lagoons.

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.