ASSOCIATION OF WEATHER VARIABLES WITH YIELD AND YIELD COMPONENTS OF COTTON (Gossypium hirsutun L.) AT REPRODUCTIVE PHENOPHASE
2017
T. RAMESH THATIKUNTA, ZENEBE MEKONNEN ADARE, A. SRINIVAS, V. PRAVEEN RAO, T. RAM PRAKASH and
Growth and development of cotton is influenced by several environmental factors such as change in temperature, amount and distribution of rainfall and carbon dioxide concentration which are attributes of climate change. A field experiment was conducted to study the contribution of weather variables for the total variation in yield and yield components during reproductive phenophase of cotton during 2013-14 and 2014-15 kharif season located within 17o19’19.64'’ N latitude and 78o 24’29.89'’ E longitudes. The experiment was set out with three sowing time (24, 26 and 28 standard week) as main plot, three deficit irrigationschedules (0.8 IW/CPE, 0.6 IW/CPE, 0.4 IW/CPE) and rainfed as sub plot in split plot design. Data on yield and yield components and daily weather variables were recorded during the study seasons and mean of yield and yield components were subjected to pair wise step down regression analysis with weather ariables. The regression analysis result showed that weather variables such as maximum temperature, mean temperature, relative humidity I and relative humidity II were found to be influential and accounted for over 90 percent of total variation in seed cotton yield and yield components during phenophase.
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