@article{nwisrl188,
          volume = {61},
            year = {1969},
         journal = {Agronomy Journal},
           title = {Photosynthesis Under Field Conditions. XA. Assessing Sources and Sinks of Carbon Dioxide in a Corn (Zea mays L.) Crop Using Momentum Balance Approach},
           pages = {405--411},
          author = {E.R. Lemon and J.L. Wright},
          number = {3},
             url = {https://eprints.nwisrl.ars.usda.gov/id/eprint/188/},
        abstract = {In a previous communication we described a meteorological
method of assessing the vertical distribution of photosynthesis
and respiration activity in a corn crop. The
method, however, is tedious. Here we describe a much
simpler method. Results indicate that all the leaves of
a corn crop appear to follow the same near-linear light
response curve, at least above the compensation point.
Below the compensation point, all leaves evidently respire
very little.}
}