摘要 : A trial was conducted at Main Cotton Research Centre, Khandwa for two consecutive seasons of 2007-2008 and 2008-2009 to evaluate the agronomic requirements of Bt cotton hybrid RCH 2 under rainfed conditions. The treatments consist... 展开 A trial was conducted at Main Cotton Research Centre, Khandwa for two consecutive seasons of 2007-2008 and 2008-2009 to evaluate the agronomic requirements of Bt cotton hybrid RCH 2 under rainfed conditions. The treatments consisted of three plant spacings (Sj=90x45, S2=90x60, S3=90x90 cm) in main plot and three fertility levels 0^=90:45:30, F2=120:60:40 and F3= 150:75:50: kg NPK/ha) in sub plot with three replications in split plot design. The results revealed that closer inter plant spacing of 90x45 cm recorded highest average seed cotton yield of 2080 kg/ha which was found to be significantly superior over 90x90 cm during both the years. A reverse trend was observed for bolls/plant and boll weight. Higher dose of fertilizer by 125 per cent (150:7 收起