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Aim: To determine the response of seed priming and nitrogen levels on yield and yield attributes of sunflower under zero till conditions succeeding rice. Study Design: Split plot. Place and Duration of Study: Krishi Vigyan Kendra, Palem, between December 2021 and  March 2022. Methodology: A field experiment was conducted at Krishi Vigyan Kendra, Palem, Nagarkurnool (District) during rabi 2021-22 to assess the effect of seed priming and nitrogen management on growth and yield of zero till sunflower (Helianthus annuus L.) succeeding rice. The experiment was assigned in twelve treatments, laid out in split plot design with three replications. Treatments included were 4 treatments of seed priming methods (i) M1 = Control (no priming) (ii) M2 = Hydropriming (iii) M3 = Osmopriming with KNO3 @ 0.1% (iv) M4 = Osmopriming with NaCl @ 0.1% and 3 nitrogen levels (i) S1 = 100% RDN (ii) S2 = 100% RDN (iii) S3 = 150% RDN (RDN randomly placed in sub plots of the main plot. Results: The results revealed that head diameter (16.4 cm), number of seeds per head (534), threshing percentage (79.0%) and seed yield (1961 kg ha-1) of zero till sunflower was significantly higher in osmopriming of seeds with KNO3 @ 0.1% over other treatments. Among nitrogen levels, head diameter (16.1 cm), number of seeds per head (551), threshing percentage (79.7%) and seed yield (1944 kg ha-1) of zero till sunflower was significantly higher under with application of 150% RDN over 100% RDN and 125% RDN. Conclusion: Adoption of seed priming with KNO3 @ 0.1% for 12 hours and applying nitrogen @ 150% RDN improves the head diameter, number of seeds per head, threshing percentage which in turn increased the rabi sunflower seed yield under zero tilled conditions succeeding to rice.

Field experiments were conducted during kharif 2014 and 2015 at Agricultural Research Institute, Rajendranagar to determine the optimum nitrogen level for Bt cotton in alfisols in Southern Telangana. Significantly more number of days (31, 47 and 94) was taken to attain square initiation, flowering and boll development stage, respectively and higher drymatter production (9.2, 129, 182 and 239 g plant -1 ) was registered at square initiation stage, flowering, boll development and first picking stages, respectively with application of nitrogen at 225 kg ha -1 . Higher earliness index (0.78) was registered when no nitrogen applied over 150 and 225 kg ha -1 with earliness index values of 0.75 and 0.74, respectively. Significantly higher seed cotton yield (1714 kg ha -1 ) was obtained with 225 kg N ha -1 and was followed by 150 kg N ha -1 (1704 kg ha -1 ). However, which were comparable with each other and significantly superior over no nitrogen and 75 kg N ha -1 application. The rate of increase in seed cotton yield with application of 75, 150 and 225 kg ha -1 over no nitrogen application was 54%, 74% and 75%, respectively. It can be concluded that, higher seed cotton yield with higher B:C ratio can be obtained with application of nitrogen at 150 kg ha -1 in Bt cotton in alfisols of South Telangana Zone.

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