RÉSUMÉ
Aim: To determine the optimum date of sowing to realize higher grain yield in rabi rice.Study Design: Split plot.Place and Duration of Study: Krishi Vigyan Kendra, Rudrur, Nizamabad during rabi, 2022.Methodology: The experiment consisted of a total of fifteen treatments which were laid out in split plot design with three replications. Treatments included were five dates of sowing in the main plot M1-20th November, M2-1st December, M3-10th December, M4-20th December, and M5-30th December and three treatments of varieties in subplots S1-JGL 24423 (long slender variety), S2-Ganga Kaveri (medium slender variety) and S3-RNR 15048 (short slender variety) randomly placed in subplots of the main plot.Results: Maximum plant height (100.3 cm), number of tillers m-2 (432), dry matter accumulation (15869 kg ha-1), grain yield (7219 kg ha-1), straw yield(8387 kg ha-1) and HI (46.1) was noticed in crop Sownon 30thDecember. Significantly maximum number of tillers m-2, dry matter accumulation (14263 kg ha-1), grain yield (6127 kg ha-1), straw yield (8650 kg ha-1) was observed in S2-Ganga Kaveriwhile significantly higher plant height (100.6 cm) and HI (45.0) was found in S3-RNR 15048. Lowest height was recorded in S2-Ganga Kaveri (92.6 cm), and above parameters were recorded lowest in crop sown on 20th November, while lowest number of tillers m-2and straw yield (8122 kg ha-1) was observed in crop sown on 1st December.Significantlyless number of tillers m-2 (326), dry matter accumulation (13981 kg ha-1), grain yield (6166 kg ha-1), straw yield (7526 kg ha-1) was recorded in S3-RNR 15048, while lowest HI (43.9) was recorded in S1-JGL 24423.Conclusion: Crop sown on 30thDecember revealed better performance in terms of grain yield under the present study during Rabi conditions. Among varieties, Ganga Kaveri (S2) performed better in terms of grain yield.
RÉSUMÉ
A field experiment was conducted during Kharif, 2022 at Krishi Vigyan Kendra, Palem, to evaluate the effect of nitrogen levels and mepiquat chloride on the yield and economics of HDPS cotton. The experiment was laid out in a randomized block design with three replications. The results of this experiment revealed that application of T9: 125% RDN applied in splits at 15, 30, 45, 60, 75 DAS along with 2 sprays of 5% mepiquat chloride at 45 and 60 DAS recorded significantly higher number of bolls plant-1 (11.7), boll weight (4.49 g) and seed cotton yield (2484 kg ha-1). In terms of economic analysis, this treatment also exhibited the highest gross returns (? 1,78,872 ha-1), net returns (? 1,03,878 ha-1) and BC ratio (2.39). Conversely, the application of T1: 75% RDN in recommended splits of 20, 40, 60, 80 DAS recorded the lowest number of bolls plant-1 (8.0), boll weight (2.53 g) and seed cotton yield (1402 kg ha-1), as well as lower gross returns (? 1,02,766 ha-1), net returns (? 33,802 ha-1) and BC ratio (1.50). Based on these findings, it is recommended to adopt the practice of applying T9: 125% RDN (150 kg N ha-1) in splits at 15, 30, 45, 60, 75 DAS along with 2 sprays of 5% mepiquat chloride at 45 and 60 DAS to achieve maximum yield and economic returns of HDPS cotton.