Coconut has a prolonged reproductive phase of 44 months from the initiation of the inflorescence primordium to full maturity of the nuts. Weather affects all stages of the long development cycle and thus there is likely to be extended predictability based on climate variability. An attempt is being made to relate the coconut sample survey data of Coconut Development Board with climate data of Chanrayapatna taluk of Hassan district. Mean nut yield per palm, per year in the Chanrayapatna taluk was . Among the villages, Baldare recorded significantly lower nut yield () followed by Gulsinda () and Janivar (). Annual rainfall during 2011, 2012 and 2016 was below normal compared to other years. Correlation of monthly nut yield/palm with rainfall showed a significant positive correlation with previous three to four years rainfall. Rainfall during 2013 and 2014 was comparatively better resulting in significantly higher nut yield during 2016 compared to 2014. Among the different stages, primordium initiation stage and ovary development stages were more strongly and significantly influenced by the weather parameters particularly temperature and contributed significantly to weather based regression model. Future climate of Chanrayapatna showed increase in annual rainfall mainly during September and October but decline during November/December. Maximum and minimum temperature showed increase by which may increase the evaporative demand resulting in moisture stress thus highlighting the importance of rain water harvesting to take advantage of increased rainfall under future climatic condition. | Climate based coconut yield analysis in Chanrayapatna Taluk of hassan district of Karnataka, India
