| Fundamentals of weed science RL Zimdahl, NT Basinger Elsevier, 2024 | 1738 | 2024 |
| Weed-crop competition, a review. RL Zimdahl | 683 | 1980 |
| Weed-crop competition: a review RL Zimdahl John Wiley & Sons, 2007 | 679 | 2007 |
| Behavior of lead in soil RL Zimdahl, RK Skogerboe Environmental Science & Technology 11 (13), 1202-1207, 1977 | 299 | 1977 |
| The concept and application of the critical weed-free period. RL Zimdahl | 255 | 1988 |
| Weed seed decline in irrigated soil after six years of continuous corn (Zea mays) and herbicides EE Schweizer, RL Zimdahl Weed Science 32 (1), 76-83, 1984 | 199 | 1984 |
| Chlorsulfuron adsorption and degradation in soil K Thirunarayanan, RL Zimdahl, DE Smika Weed Science 33 (4), 558-563, 1985 | 189 | 1985 |
| Degradation of three acetanilide herbicides in soil RL Zimdahl, SK Clark Weed Science 30 (5), 545-548, 1982 | 156 | 1982 |
| Allelopathic activity of Canada thistle (Cirsium arvense) in Colorado WJ Stachon, RL Zimdahl Weed Science 28 (1), 83-86, 1980 | 148 | 1980 |
| Entry and movement in vegetation of lead derived from air and soil sources RL Zimdahl Journal of the Air Pollution Control Association 26 (7), 655-660, 1976 | 139 | 1976 |
| Degradation of pendimethalin in soil RL Zimdahl, P Catizone, AC Butcher Weed Science 32 (3), 408-412, 1984 | 134 | 1984 |
| Bioeconomic modeling to simulate weed control strategies for continuous corn (Zea mays) RP King, DW Lybecker, EE Schweizer, RL Zimdahl Weed Science 34 (6), 972-979, 1986 | 125 | 1986 |
| Soil degradation of three dinitroanilines RL Zimdahl, SM Gwynn Weed Science 25 (3), 247-251, 1977 | 120 | 1977 |
| Rate of degradation of metribuzin and two analogs in soil DL Hyzak, RL Zimdahl Weed Science 22 (1), 75-79, 1974 | 116 | 1974 |
| Simulation of the persistence of atrazine, linuron and metolachlor in soil at different sites in the USA A Walker, RL Zimdahl Weed Research 21 (6), 255-265, 1981 | 113 | 1981 |
| Allelopathy of leafy spurge (Euphorbia esula) DA Steenhagen, RL Zimdahl Weed Science 27 (1), 1-3, 1979 | 97 | 1979 |
| The degradation of triazine and uracil herbicides in soil RL Zimdahl, VH Freed, ML Montgomery, WR Furtick Weed research 10 (1), 18-26, 1970 | 86 | 1970 |
| Agriculture's ethical horizon RL Zimdahl Elsevier, 2012 | 85 | 2012 |
| Weed seed decline in irrigated soil after rotation of crops and herbicides EE Schweizer, RL Zimdahl Weed Science 32 (1), 84-89, 1984 | 80 | 1984 |
| The influence of applied phosphorus, manure, or lime on uptake of lead from soil RL Zimdahl, JM Foster Journal of Environmental Quality 5 (1), 31-34, 1976 | 74 | 1976 |
