@article{Santos:257012,
      recid = {257012},
      author = {Santos, B. M. and Morales-Payan, J. P. and Stall, W. M.},
      title = {INFLUENCE OF MIXED POPULATION DENSITIES OF SMOOTH PIGWEED  (Amaranthus hybridus) AND COMMON PURSLANE (Portulaca  oleracea) ON LETTUCE (Lactuca sativa) DRY MATTER  ACCUMULATION},
      address = {1997-07-06},
      number = {1887-2017-828},
      pages = {5},
      year = {1997},
      abstract = {Interference trials were conducted under greenhouse  conditions to determine the effects of mixed densities of  smooth pigweed and common purslane on the initial growth of  lettuce. Weeds were allowed to interfere with lettuce for  30 days before collecting plant dry matter of each species  growing in the containers Densities used were 1, 2, 4, 6  and 8 weeds per container, along with the weed-free  control. Monocultures of each weed were established along  with the 50:50 proportion within each density, except for 1  plant per container. Interference of monostands of common  purslane reduced lettuce dry matter accumulation more than  smooth pigweed monostands within each density. Four common  purslane plants per container reduced dry matter in as much  as 6 or 8 smooth pigweed plants per container. In all  cases, within a given density, 50:50 mixture treatments  produced more lettuce dry matter than common purslane  monocultures.},
      url = {http://ageconsearch.umn.edu/record/257012},
      doi = {https://doi.org/10.22004/ag.econ.257012},
}