Abstract:
From a field experiment conducted at Central Rice Research Institute
during 1972-73 it is seen that duration of rice crop is found to be mainly
influenced by temperature. The duration of vegetative and ripening phases are
prolonged under conditions of low night temperature. It is further noticed
that a particular variety will reach maturity only if exposed to a minimum
heat requirement. The temperature summation varies with the duration of a
variety, a long duration variety is having a higher temperature summation
than a short duration variety.
