Skip Navigation

University of Nebraska–Lincoln

Agronomy and Horticulture

The Science and Application of Plants to Sustain and Enhance Human Life

John L. Lindquist

Associate Professor
Weed/Crop Ecophysiology

Contact Information
(click on Back button in browser to return to this page)

CONTACT INFORMATION:

ADDRESS:

105C KCR Lab
Department of Agronomy and Horticulture
University of Nebraska-Lincoln
P. O. Box 830817
Lincoln, NE 68583-0817

PHONE: (402) 472-2771

FAX: (402) 472-7904

lindquist_john.jpg

DEGREES:

  • B.S., Botany/Secondary Science Education, Montana State University, 1988
  • M.S., Agronomy (Weed Population Biology), University of Minnesota, 1994
  • Ph.D., Agronomy(Weed/Crop Ecophysiology), University of Nebraska, 1997

RESEARCH INTERESTS:

My research program is focused on gaining a better understanding of the biological mechanisms of interplant competition and using that understanding to develop weed management practices that reduce reliance on herbicides. My interests are whole-plant physiology oriented and quantitative in nature.

COURSES TAUGHT:

  • Agronomy 220 – Principles of Weed Science. This course is taught every spring semester at UNL. The course provides a background on weed identification and biology; weed interference in crops; weed control by preventive, cultural, biological, mechanical, and chemical means; herbicide terminology and classification; equipment calibration and dosage calculations.

  • Agronomy 896 – Interplant Competition in Managed Ecosystems. This course is taught in alternate (odd) years during the spring semester. This course will focus on whole plant physiological response to solar radiation, water, and nutrients, and on interplant competition for these resources. Quantitative relationships useful for integrating the interactive affects of these factors on plant growth and interplant competition will be stressed. The course will be a mixture of lecture, discussion of relevant literature, and homework sets.

  • Agronomy 896 - Weed Science Colloquium. This 1-credit course is taught in the fall and is designed to familiarize graduate students with our science and contemporary literature.

  • Agriculture 810 – Research Strategies in Agriculture. A 1-credit discussion course taught during the Fall semester. Focuses on practical topics related to the planning, organization, administration, financing and reporting of research in Agriculture. I co-coordinate this course with Dr. Jeff Keown in Animal Sciences.

MAJOR PROJECT ACTIVITIES:

We currently have three foci in my group, but these are not the limits of our interest.

  1. Contribution of Fusarium lateritium to weed suppressive soils and weed abundance. Funded through the USDA NRI Competitive Grants Program. The long-range goal of this research is to develop low-cost best management practices that improve the consistency and efficacy of weed suppressive soils.
  2. Effect of transgenes from sorghum on the fitness of shattercane × sorghum hybrids. Funded through a cooperative agreement with USDA ARS. Sorghum with transgenes (TRXh) causing it to have purported increased digestibility due to over-expression of thioredoxin (TRX) will be crossed to shattercane in the greenhouse. Hybrid progeny with and without transgenes will be evaluated to determine presence of the transgenes. Fitness parameters of the F1 hybrids and subsequent generations will be compared to their parental lines to evaluate any potential increase in invasiveness of shattercane containing the transgene.
  3. Effects of variable water supply on corn and velvetleaf growth, water use, and interplant interference. The goal of this research is to understand how water supply influences interplant competition and obtain sufficient data to forecast the risks associated with variable water supply in specific environments across Nebraska and the Great Plains. Experiments are being conducted in the greenhouse and in the field.

EXTENSION INTERESTS:

I'm very interested in applying what we've learned through our research by incorporating results and important concepts about crop and weed growth and competition into decision support tools. WeedSOFT is a software package that can be used to help select appropriate weed management tactics for specific Nebraska cropping systems. We are currently exploring ways to improve the program using weed biology and crop-weed interference research results.


SELECTED PUBLICATIONS (Last Five Years):

  • Bonifas, K. D. and J. L. Lindquist. 2009. Effects of nitrogen supply on the root morphology of corn and velvetleaf. Journal of Plant Nutrition 32:1371-1382.

  • Terra, B. R. M., A. R. Martin and J. L. Lindquist. 2007. Corn-velvetleaf (Abutilon theophrasti) interference is affected by sublethal doses of postemergence herbicides. Weed Science 55:491-496.

  • Williams, M. M. II and J. L. Lindquist. 2007. Influence of planting date and weed interference on sweet corn growth and development. Agronomy Journal 99:1066-1072.

  • Lindquist, J. L., D. C. Barker, S. Z. Knezevic, A. R. Martin and D. T. Walters. 2007. Comparative nitrogen uptake and distribution in corn and velvetleaf (Abutilon theophrasti). Weed Science 55:102-110.

  • Wang, G., M. E. McGiffen, Jr., J. L. Lindquist, J. D. Ehlers and I. Sartorato. 2007. Simulation study of the competitive ability of erect, semi-erect, and prostrate cowpea (Vigna unguiculata) genotypes. Weed Research 47:129-139.

  • Gustafson, T. C., S. Z. Knezevic, T. E. Hunt and J. L. Lindquist. 2006. Simulated insect defoliation and duration of weed interference affected soybean growth. Weed Science 54:735-742.

  • Gustafson, T. C., S. Z. Knezevic, T. E. Hunt and J. L. Lindquist. 2006. Early season insect defoliation influences the critical time for weed removal in soybean. Weed Science 54:509:515.

  • Hock, S. M., S. Z. Knezevic, A. R. Martin and J. L. Lindquist. 2006. Performance of WeedSOFT for predicting soybean yield loss. Weed Technology 20:478-484.

  • Barker, D. C., S. Z. Knezevic, A. R. Martin, D. T. Walters and J. L. Lindquist. 2006. Effect of nitrogen addition on the comparative productivity of corn and velvetleaf (Abutilon theophrasti). Weed Science 54:354-363.

  • Bonifas, K. D. and J. L. Lindquist. 2006. Predicting biomass partitioning to root versus shoot in corn and velvetleaf (Abutilon theophrasti). Weed Science 54:133-137.

  • Burton, M. G., D. A. Mortensen, and J. L. Lindquist. 2006. Effect of cultivation and within-field differences in soil conditions on feral Helianthus annuus growth in ridge-tillage maize. Soil and Tillage Research 88:8-15.

  • Hock, S. M., S. Z. Knezevic, A. R. Martin and J. L. Lindquist. 2006. Soybean row spacing and weed emergence time influence weed competitiveness and competitive indices. Weed Science 54:38-46.

  • Davis, A. S., J. Cardina, F. Forcella, G. A. Johnson, G. Kegode, J. L. Lindquist, E. C. Luschei, K. A. Renner, C. L. Sprague and M. M. Williams II. 2005. Environmental factors affecting seed persistence of annual weeds across the U.S. corn belt. Weed Science 53:860-868.

  • Bonifas, K. D., D. T. Walters, K. G. Cassman and J. L. Lindquist. 2005. Nitrogen supply affects root:shoot ratio in corn and velvetleaf (Abutilon theophrasti). Weed Science 53:670-675.

  • Lindquist, J. L., T. J. Arkebauer, D. T. Walters, K. G. Cassman and A. Dobermann. 2005. Maize radiation use efficiency under optimal growth conditions. Agronomy Journal 97:72-78.

  • Hock, S. M., S. Z. Knezevic, A. R. Martin and J. L. Lindquist. 2005. Influence of soybean row width and velvetleaf emergence time on velvetleaf (Abutilon theophrasti). Weed Science 53:160-165.

  • Waltz, A. L., A. R. Martin, F. W. Roeth, and J. L. Lindquist. 2004. Glyphosate efficacy on velvetleaf varies with application time of day. Weed Technology 18:931-939.

  • Fischer, D. W., R. G. Harvey, T. T. Bauman, S. Phillips, S. E. Hart, G. A. Johnson, J. J. Kells, J. Lindquist, P. Westra. 2004. Chenopodium album interference with Zea mays across the north central USA. Weed Science 52:1034-1038.

  • Burton, M. G., D. A. Mortensen, D. B. Marx, and J. L. Lindquist. 2004. Factors affecting the realized niche of common sunflower (Helianthus annuus L.) in ridge tillage corn. Weed Science 52:779-787.

  • Yang, H. S., A. Dobermann, J. L. Lindquist, D. T. Walters, T. J. Arkebauer, and K. G. Cassman. 2004. Hybrid-Maize - a maize simulation model that combines different crop modeling approaches. Field Crops Research 87:131-154.

  • Deen, W., R. Cousens, J. Warringa, L. Bastianns, P. Carberry, K, Rebel, S. Riha, C. Murphy, L. R. Benjamin, C. Cloughley, J. Cussans, F. Forcella, T. Hunt, P. Jamieson, J. Lindquist, and E. Wang. 2003. An evaluation of four crop:weed competition models using a common data set. Weed Research 43:116-129.

  • Evans, S. P., S. Z. Knezevic, J. L. Lindquist, and C. A. Shapiro. 2003. Influence of nitrogen and duration of weed interference on corn growth and development. Weed Science 51:546-556.

  • Evans, S. P., S. Z. Knezevic, J. L. Lindquist, C. A. Shapiro, and E. E. Blankenship. 2003. Nitrogen application influences the critical period for weed control in corn. Weed Science 51:408-417.