@article{icrisat1772,
           title = {Predicting growth and development of pigeonpea: flowering response to photoperiod},
       publisher = {Elsevier},
          author = {P S Carberry and R Ranganathan and L J Reddy and Y S Chauhan and M J Robertson},
           pages = {151--162},
            year = {2001},
          volume = {69},
         journal = {Field Crops Research},
          number = {2},
             url = {http://oar.icrisat.org/1772/},
        abstract = {Data from sowing-date and other experiments conducted for nine cultivars at three locations ranging from 18300S to 278150N were analysed for photoperiod response. All cultivars were found to have a qualitative response to photoperiod. The results of the analysis show that cultivars previously reported to be "relatively insensitive" to photoperiod were, in fact, highly sensitive. Flowering in short-duration cultivars was delayed by up to a 100 days when daylength in the photoperiod-inductive phase exceeded a critical value. Medium- and long-duration cultivars delayed flowering by over 150 days in response to photoperiod. A model was able to predict this wide range in flowering dates.}
}