Garry Grabow


  • 919-515-8242
  • Weaver Administration Bldg 104
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Dr. Garry Grabow, P.E. has expertise in land application of animal and industrial wastewater, irrigation systems and irrigation water management, and water quality monitoring. He provides training to operators of animal waste systems and operators of surface irrigation systems for land application of waste, and also to certified irrigation contractors.

Dr. Grabow’s research interests include irrigation water management, land application of waste and water quality impacts of various land application systems. Grabow is involved in applied research projects that are evaluating the effectiveness of several different “smart” irrigation technologies in turfgrass in both research and homeowner settings. He is also involved in a study that is evaluation the effectiveness of chlorination technologies to disinfect irrigation water for use on fresh produce. He has also led research in subsurface irrigation systems for use in both freshwater and wastewater applications.

Prior to coming to NC State, Dr. Grabow worked for an irrigation district in California and spent 10 years in private water resources consulting. He has previous experience with international consulting including water reuse projects in the Middle East.

Dr. Grabow work with industry has been recognized by the NC Cooperative Extension Foundation and awarded the NC State Grange Search for Excellence Award in 2011. Dr. Grabow serves as Technical Advisor to the North Carolina Irrigation Society and is the UNC University System appointed member to the North Carolina Irrigation Contractor’s Licensing Board.


Ph.D. 1993

Agricultural Engineering

University of Tennessee

M.S. 1984

Irrigation Science

Utah State University

B.S. 1979

Soil and Water Science

University of California

Research Description

Irrigation systems for wastewater, agricultural lands and turfgrass, irrigation water management

Honors and Awards

  • Carolinas Irrigation Association (CIA) Ron Sneed Award, 2016
  • NC Irrigation Award, 2013
  • NC State Grange Search for Excellence Award from NC Extension, 2011


Discussion of "Cylindrical Central Baffle Flume for Flow Measurement in Open Channels" by Aniruddha D. Ghare, Ankur Kapoor, and Avinash M. Badar
Color, Transfer, and Application Parameters of Turfgrass Colorants
Pinnix, G. D., Miller, G. L., Bowman, D. C., & Grabow, G. L. (2018), AGRONOMY JOURNAL, 110(1), 66–76.
Water Conservation Potential of Smart Irrigation Technologies in the Catawba-Wateree River Basin
Vick, R. L., Grabow, G. L., Miller, G. L., & Huffman, R. L. (2017), JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 143(2).
Influence of Drawdown Period on Overflow Volume and Pollutant Treatment for Detention-Based Stormwater Control Measures in Raleigh, North Carolina
Smolek, A. P., Hunt, W. F., III, & Grabow, G. L. (2015), Journal of Sustainable Water in the Built Environment, 1(2), 05015001.
Residential Irrigation Water Use in the Central Piedmont of North Carolina. I: Measured Use and Water Requirements
Nautiyal, M., Grabow, G. L., Huffman, R. L., Miller, G. L., & Bowman, D. (2015), JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 141(4).
Residential Irrigation Water Use in the Central Piedmont of North Carolina. II: Evaluation of Smart Irrigation Technologies
Nautiyal, M., Grabow, G. L., Huffman, R. L., Miller, G. L., & Bowman, D. (2015), JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 141(4).
Corn, cotton, and peanut response to tillage and subsurface drip irrigation in north carolina
Jordan, D. L., Johnson, P. D., Grabow, G. L., & Corbett, T. (2014), Agronomy Journal, 106(3), 962–967.
Wiseman, J. D., Burchell, M. R., Grabow, G. L., Osmond, D. L., & Messer, T. L. (2014), JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, 50(3), 653–664.
Water Application Efficiency and Adequacy of ET-Based and Soil Moisture-Based Irrigation Controllers for Turfgrass Irrigation
Grabow, G. L., Ghali, I. E., Huffman, R. L., Miller, G. L., Bowman, D., & Vasanth, A. (2013), JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 139(2), 113–123.
Factors affecting uniformity of irrigation-type manure application systems
Liu, Z., Grabow, G. L., Huffman, R. L., Osborne, J., & Evans, R. O. (2012), Applied Engineering in Agriculture, 28(1), 43–56.

View all publications via NC State Libraries

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Development and Field Validation of New Sensor Technology for Characterizing Maize Yield Components
Syngenta Crop Protection, LLC(7/15/15 - 12/31/17)
Comparison of Irrigation Water Management Strategies Under Limited Water Conditions
Corn Growers Association of NC, Inc.(2/01/14 - 1/31/16)
Increasing Water Use Efficiency in High Population Corn Systems Grown Under Irrigation
Corn Growers Association of NC, Inc.(2/01/13 - 1/31/16)
Water Use Efficiency of Soil-Water-Sensor-Controlled Irrigation with a Subsurface Drip Irrigation System Contrasted with Center Pivot Irrigation in a Corn-Wheat-Soybean Crop Rotation
NC Soybean Producers Association, Inc.(3/01/11 - 11/30/14)
Evaluation of Selected Consumer Lawn Tractors for Turf Mowing Characteristics
Deere & Company(10/15/13 - 10/14/14)
Heath Dairy Livestock Exclusion and Stream Restoration
US Environmental Protection Agency (EPA)(1/01/11 - 9/30/14)
Irrigation System and Water Management Training to Conserve Water and Reduce Nutrient Losses
Environmental Defense Fund(10/01/12 - 6/30/14)
Soil Moisture Management in Drip Irrigated Sweetpotatoes and its Effect on Root Yields and Quality
NC Sweet Potato Commission(3/01/12 - 2/28/13)
Catawba River Basin Residential Irrigation Water Conservation Study
Duke Energy Carolinas, LLC (Duke Power)(2/10/09 - 3/31/12)
Preliminary Evaluation of Using Drip Irrigation for Production of Sweetpotatoes in North Carolina
NC Sweet Potato Commission(3/01/11 - 2/29/12)