World's Best Scientists 2026 revealed!

Research.com Recognitions

  • 1989 - Syngenta Crop Protection Recognition Award, American Society of Agronomy

Best Publications

  • Statistical Tests for Hormesis and Effective Dosages in Herbicide Dose Response

    Oliver Schabenberger;Brent E. Tharp;James J. Kells;Donald Penner

  • Weed suppression by annual legume cover crops in no-tillage corn

    John W. Fisk;Oran B. Hesterman;Anil Shrestha;James J. Kells

  • Horseweed (Conyza canadensis) control in no-tillage soybeans (Glycine max) with preplant and preemergence herbicides.

    Joseph A. Bruce;James J. Kells

  • Absorption, Translocation, and Activity of Fluazifop-Butyl as Influenced by Plant Growth Stage and Environment'

    James J. Kells;William F. Meggitt;Donald Penner

  • STABILITY OF CORN (ZEA MAYS)-VELVETLEAF (ABUTILON THEOPHRASTI) INTERFERENCE RELATIONSHIPS

    John L. Lindquist;David A. Mortensen;Sharon A. Clay;Richard Schmenk

  • Effect of Glufosinate-Resistant Corn (Zea mays) Population and Row Spacing on Light Interception, Corn Yield, and Common Lambsquarters (Chenopodium album) Growth1

    Brent E. Tharp;James J. Kells

  • Stability of corn ( Zea mays )- foxtail ( Setaria spp.) interference relationships

    John L. Lindquist;David A. Mortensen;Philip Westra;W. J. Lambert

  • Effect of Glyphosate Application Timing and Row Spacing on Corn (Zea mays) and Soybean (Glycine max) Yields1

    Caleb D. Dalley;James J. Kells;Karen A. Renner

  • Physiological basis for nicosulfuron and primisulfuron selectivity in five plant species

    J. Boyd Carey;Donald Penner;James J. Kells

  • Effect of Weed Removal Timing and Row Spacing on Soil Moisture in Corn (Zea mays)

    Caleb D. Dalley;Mark L. Bernards;James J. Kells

  • Effect of Glyphosate Application Timing and Row Spacing on Weed Growth in Corn (Zea mays) and Soybean (Glycine max) 1

    Caleb D. Dalley;James J. Kells;Karen A. Renner

  • Response of annual weed species to glufosinate and glyphosate

    Brent E. Tharp;Oliver Schabenberger;James J. Kells

  • Effect of Postemergence Glyphosate Application Timing on Weed Control and Grain Yield in Glyphosate-Resistant Corn: Results of a 2-Yr Multistate Study

    Steven A. Gower;Mark M. Loux;John Cardina;S. Kent Harrison

  • Effect of DPX-V9360 and Terbufos on Field and Sweet Corn (Zea mays) Under Three Environments

    Cathy A. Morton;R. Gordon Harvey;James J. Kells;William E. Lueschen

  • Substitutes for ammonium sulfate as additives with glyphosate and glufosinate

    David Pratt;James J. Kells;Donald Penner

  • Influence of adjuvants on the efficacy absorption, and spray retention of primisulfuron

    Stephen E. Hart;James J. Kells;Donald Penner

  • Influence of herbicide application rate, timing, and interrow cultivation on weed control and corn (zea mays) yield in glufosinate-resistant and glyphosate-resistant corn

    Brent E. Tharp;James J. Kells

  • Residual Herbicides used in Combination with Glyphosate and Glufosinate in Corn (Zea mays) 1

    Brent E. Tharp;James J. Kells

  • Identification of Efficacious Adjuvants for Sethoxydim and Bentazon

    Gunawan Wanamarta;Donald Penner;J. J. Kells

  • GIANT FOXTAIL (SETARIA FABERI) INTERFERENCE IN NONIRRIGATED CORN (ZEA MAYS)

    Jason C. Fausey;James J. Kells;Scott M. Swinton;Karen A. Renner

Frequent Co-Authors

Donald Penner
Donald Penner Michigan State University
Karen A. Renner
Karen A. Renner Michigan State University
John L. Lindquist
John L. Lindquist University of Nebraska–Lincoln
Philip Westra
Philip Westra Colorado State University
David A. Mortensen
David A. Mortensen University of New Hampshire
William G. Johnson
William G. Johnson Purdue University West Lafayette
Kurt D. Thelen
Kurt D. Thelen Michigan State University
Sharon A. Clay
Sharon A. Clay South Dakota State University
Bryan G. Young
Bryan G. Young Purdue University West Lafayette
Peter H. Sikkema
Peter H. Sikkema University of Guelph

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