Dr. M. HANUMANTHAPPACHANDRASHEKHARDr. S. SRIDHARA2020-06-232020-06-232018-07-10http://krishikosh.egranth.ac.in/handle/1/5810147904Afield experiment was conducted at Zonal Agricultural and Horticultural Research Station, Brahmavara, UAHS, Shivamogga duringkharif 2017 to study the crop weather relationships in rice under different methods of establishment. The experiment was laid out in split plot design with three replications. There were ten treatment combinations comprise of two rice establishment systems as main plots (conventional and System of Rice Intensification) and five dates of transplanting as sub plots (June 3rd week, July 1st week, July 3rd week, August 1st week and August 3rd week). Among different systems of rice establishment, SRI recorded significantly higher plant height (102.99 cm),total dry weight (75.92 g hill-1), grain yield (4588 kg ha-1), straw yield (7016 kg ha-1), HUE (4.59 10-2 g 0C day-1), PTUE (8.93 10-2 g 0C hrs-1), HTUE (12.29 10-3 g 0C day-1) and RUE (3.27 g MJ-1) compared to conventional method. Among the transplanting datesJune 3rd week transplanted crop recorded significantly higher plant height(107.71 cm), total dry weight (77.01g hill-1), grain yield (5158kg ha-1), straw yield (7151kg ha-1), HUE(4.81 10-2 g 0C day-1), PTUE (9.17 10-2 g 0C hrs-1), HTUE (16.12 10-3 g 0C day-1) and RUE (3.03 g MJ-1) compared to other dates of transplanting. Rainfall (r = 0.74**) and relative humidity (r = 0.68**) during soft dough stage to hard dough stage had positive relation with grain yield of rice. On the other hand maximum temperature from transplanting to tillering (r = -0.69**), panicle initation to 50 % flowering (r = -0.96**), 50 % flowering to soft dough stage (r = -0.93**), soft dough stage to hard dough stage (r = -0.73**) and minimum temperature from soft dough stage to hard dough stage(r = -0.58**) had negative relationship with grain yield of rice.ennullThesis