Duration of rice as influenced by seasons and meteorological elements

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.