Exploring the limits of crop productivity: beyond the limits of tipburn in lettuce.

@article{Frantz2004ExploringTL,
  title={Exploring the limits of crop productivity: beyond the limits of tipburn in lettuce.},
  author={Jonathan M. Frantz and Glen Ritchie and Nilton N{\'e}lio Cometti and Justin Robinson and Bruce Bugbee},
  journal={Journal of the American Society for Horticultural Science. American Society for Horticultural Science},
  year={2004},
  volume={129 3},
  pages={331-8}
}
The productivity of lettuce in a combination of high light, high temperature, and elevated CO2 has not been commonly studied because rapid growth usually causes a calcium deficiency in meristems called tipburn, which greatly reduces quality and marketability. We eliminated tipburn by blowing air directly onto the meristem, which allowed us to increase the photosynthetic photon flux (PPF) to 1000 micromoles m-2 s-1 (57.6 mol m-2 d-1); two to three times higher than normally used for lettuce… CONTINUE READING

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