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Profitability of abrasive weeding in organic grain and vegetable crops

  • Sam E. Wortman (a1), Frank Forcella (a2), David Lambe (a1), Sharon A. Clay (a3) and Daniel Humburg (a4)...


Weed competition, especially within the crop row, limits the productivity and profitability of organic crop production. Abrasive weeding, a mechanical alternative to hand weeding, uses air-propelled grits to control small weed seedlings growing within the crop row. Recent research has demonstrated the successful use of abrasive weeding to reduce weed competition and increase yields in organic maize (Zea mays), tomato (Solanum lycopersicum) and green and red pepper crops (Capsicum annuum), but the profitability of this weed control tactic has not been assessed. Our objective was to determine the profitability of abrasive weeding using empirical yield data from three previously published studies, a range of crop prices and revenues, and a range of costs for wages, grit applicator ownership, tractor use, abrasive grits, and fuel. Results suggest that abrasive weeding was not profitable in organic maize production, and may reduce net income by US$223–3537 ha−1 compared with inter-row cultivation alone for weed control. The cost of abrasive weeding in maize was largely dependent on the cost of abrasive grits and the cost to own a four-row grit applicator (US$736–2105 yr−1). However, abrasive weeding was less expensive than hand weeding, especially as the scale of production increased. Abrasive weeding was profitable in tomato and pepper crops and increased net mean income by US$12,251–33,265 ha−1. However, abrasive weeding was not 100% effective and hand weeding for weed-free conditions was always the most profitable approach to in-row weed management in vegetable crops. The profit potential of the hand-weeded, weed-free treatments demonstrates the importance of weed control in high-value specialty crops–even those grown in plastic mulch film. Despite the profit potential for hand weeding observed here, labor is increasingly difficult to source, retain and afford, and abrasive weeding offers a mechanical alternative with 66% less labor required. Further research is needed to improve the efficacy of abrasive weeding and to reduce the cost of abrasive grits and application.


Corresponding author

Author for correspondence: Sam E. Wortman, E-mail:


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Baker, BP and Mohler, CL (2015) Weed management by upstate New York organic farmers: strategies, techniques and research priorities. Renewable Agriculture and Food Systems 30, 418427.
Braun, E (2017) Abrasive Grit Application for Integrated Weed and Nitrogen Management in Organic Vegetable Cropping Systems (M.S. Thesis). University of Illinois at Urbana – Champaign, Urbana, IL.
Brown, B and Gallandt, ER (2017) To each their own: case studies of four successful, small-scale organic vegetable farmers with distinct weed management strategies. Renewable Agriculture and Food Systems 17.
Carlson, M (2018) Selected Agricultural Grits for Weed Control, Effect on Corn and Soybean Yield, Weed Growth, and Soil Mineralization (M.S. Thesis). South Dakota State University, Brookings, SD.
Carlson, M, Forcella, F, Wortman, SE and Clay, SA (2018) Using abrasive grit for weed management in field crops. In Physical Properties and Physical Methods for Stimulation of Plant Development (in press). InTech, Rijeka, Croatia. ISBN 978-953-51-5766-3.
Dartt, BA and Schwab, GD (2001) Crops and Livestock Budgets Estimates for Michigan. Michigan State University, Department of Agricultural Economics, Agricultural Economic Rep. 609.
Edwards, W (2015) Estimating Farm Machinery Costs: Ag Decision Maker. A3-29. Ames, IA: Iowa State University Extension.
Erazo-Barradas, M, Friedrichsen, CN, Forcella, F, Humburg, D and Clay, SA (2017) Propelled abrasive grit applications for weed management in transitional corn grain production. Renewable Agriculture and Food Systems 18.
Escalante, CL and Luo, T (2017) Sustaining a healthy farm labor force: issues for policy consideration. Choices (New York, N Y) 32, 19.
Fennimore, SA and Doohan, DJ (2008) The challenges of specialty crop weed control, future directions. Weed Technology 22, 364372.
Fennimore, SA, Smith, RF, Tourte, L, LeStrange, M and Rachuy, JS (2014) Evaluation and economics of a rotating cultivator in Bok Choy, Celery, Lettuce, and Radicchio. Weed Technology 28, 176188.
Forcella, F, James, T and Rahman, A (2011) Post-emergence weed control through abrasion with an approved organic fertilizer. Renewable Agriculture and Food Systems 26, 3137.
Forcella, F, Humburg, D, Wortman, S and Clay, SA (2017) Air-propelled abrasive grit can damage the perennial weed, quackgrass. Canadian Journal of Plant Science 98, 963966.
Gianessi, LP and Reigner, NP (2007) The value of herbicides in U.S. crop production. Weed Technology 21, 559566.
Granatstein, D, Andrews, P and Groff, A (2014) Productivity, economics, and fruit and soil quality of weed management systems in commercial organic orchards in Washington state, USA. Organic Agriculture 4, 197207.
Jerkins, D and Ory, J (2016) National Organic Research Agenda. Santa Cruz, CA: Organic Farming Research Foundation, 126 p. Verified 27 July 2018.
Klonsky, K (2012) Comparison of production costs and resource use for organic and conventional production systems. American Journal of Agricultural Economics 94, 314321.
Klonsky, K, Tourte, L and Chaney, D (1993) Production Practices and Sample Costs for Organic Processing Tomatoes in the Sacramento Valley. Davis, CA: University of California Cooperative Extension.
Klonsky, K, Tourte, L, Chaney, D, Livingston, P and Smith, R (1994) Cultural Practices and Sample Costs for Organic Vegetable Production on the Central Coast of California. University of California, Giannini Foundation Inf. Series No. 94-2, Oakland, CA.
Melander, B (1998) Economic aspects of physical intra-Row weed control in seeded onions. In Foguelman, D and Lockeretz, W (eds), Proceedings of the 12th International IFOAM Scientific Conference. Mar del Plata, Argentina: International Federation of Organic Agriculture Movements, pp. 180185.
Nemming, A (1994) Costs of flame cultivation. Acta Horticulturae 372, 205212.
Perez-Ruiz, M, Brenes, R, Urbano, JM, Slaughter, DC, Forcella, F and Rodríguez-Lizana, A (2018) Agricultural residues are efficient abrasive tools for weed control. Agronomy for Sustainable Development 38, 18.
Pimentel, D, Hepperly, P, Hanson, J, Douds, D and Seidel, R (2005) Environmental, energetic, and economic comparisons of organic and conventional farming systems. BioScience 55, 573582.
Sørensen, CG, Madsen, NA and Jacobsen, BH (2005) Organic farming scenarios: operational analysis and costs of implementing innovative technologies. Biosystems Engineering 91, 127137.
Sørensen, CG, Nørremark, M, Jørgensen, RN, Jensen, K, Maagaard, J and Jensen, LA (2007) HortiBot: Feasibility study of a plant nursing robot performing weeding operations—part IV. 12. In. ASABE Annual International Meeting Papers. St. Joseph, MI American Society of Agricultural and Biological Engineers, Paper 077019.
University of Illinois FarmDoc (2018) Illinois Farm Management Handbook: Machinery Costs. Verified 19 April 2018.
University of Vermont Extension (2018) Vermont Vegetable and Berry Grower Pages. Verified 19 April 2018.
USDA Economic Research Service (2018) Organic Prices. Verified 19 April 2018.
USDA National Agricultural Statistics Service (2018) Farm Labor Surveys. Verified 19 April 2018.
U.S. Energy Information Administration (2018) Petroleum and Other Liquids: Weekly Retail Gasoline and Diesel Prices. Verified 19 April 2018.
Wortman, SE (2014) Integrating weed and vegetable crop management with multifunctional air-propelled abrasive grits. Weed Technology 28, 243252.
Wortman, SE (2015) Air-propelled abrasive grits reduce weed abundance and increase yields in organic vegetable production. Crop Protection 77, 157162.
Wortman, SE, Lindquist, JL, Haar, MJ and Francis, CA (2010) Increased weed diversity, density and above-ground biomass in long-term organic crop rotations. Renewable Agriculture and Food Systems 25, 281295.


Profitability of abrasive weeding in organic grain and vegetable crops

  • Sam E. Wortman (a1), Frank Forcella (a2), David Lambe (a1), Sharon A. Clay (a3) and Daniel Humburg (a4)...


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