Browsing by Author "A.L. Jat"

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Effect of crop-establishment methods and integrated nitrogen management on productivity of hybrid rice (Oryza sativa)–wheat (Triticum aestivum) cropping system
(Indian Society of Agronomy, 2015) A.L. Jat; V.K. Srivastava; Rajesh Kumar Singh
A field experiment was conducted during the 2 rainy (kharif) and winter (rabi) seasons (2012–14) on sandyclay- loam soil at Varanasi, to study the effect of crop-establishment methods and integrated nitrogen management on productivity of hybrid rice (Oryza sativa L.)–wheat (Triticum aestivum L. emend. Fiori & Paol.) cropping system. The experiment was laid out in a split-plot design, comprising crop-establishment methods (normal transplanting and system of rice intensification) and 2 hybrids (‘PHB 71’ and ‘Arize 6444’) in combination as main plot and 6 integrated nitrogen-management practices [100% recommended dose of fertilizer (RDF), 125% recommended dose of nitrogen (RDN), 50% RDN + 50% N through farmyard manure (FYM), 50% RDN + 50% N through FYM + Azospirillum, 100% N through FYM and No fertilizer)] as subplot treatments, replicated thrice. System of rice intensification (SRI) improved the growth attributes, viz. plant height, number of tillers, dry-matter accumulation, and increased the grain yield by 14.7% over normal transplanting (5.69 t/ha) and recorded significantly higher net monetary returns and output: input ratio over normal transplanting. Rice hybrid, ‘Arize 6444’ showed significantly higher growth attributes, grain yield, economic return/day and net return with output: input ratio. Integrated N management with 50% RDN + 50% N through FYM + Azospirillum resulted in high growth, yield, crop productivity, return/ day and net returns. However output: input ratio were recorded higher with 125% RDN followed by 100% RDN. Residual effect of preceding experimental variables particularly normal transplanting, hybrid ‘PHB 71’ and application of 50% RDN + 50% N through FYM + Azospirillum recorded the highest number of effective tillers, grains/ear 1,000-seed weight and grain and straw yield of succeeding wheat. © 2015, Indian Society of Agronomy. All rights reserved.
Productivity and profitability of rice (Oryza sativa) hybrids as influenced by date of transplanting and age of seedling under system of rice intensification
(Indian Society of Agronomy, 2016) Akhilesh Vishwakarma; J.K. Singh; Rajesh Kumar Singh; A.L. Jat
The field experiment was conducted during the rainy (kharif) seasons of 2012 and 2013 on sandy-clay loam soil at Varanasi, Uttar Pradesh, to evaluate suitable date of transplanting (27 June, 7 July and 17 July) and age of seedling (10, 14 and 18-days-old) of rice (Oryza sativa L.) hybrids (‘PHB 71’ and ‘Pusa RH 10’) under system of rice intensification. Transplanting of rice on 27 June showed significantly higher growth parameters, viz. plant height, tillers/hill, leaf-area index (LAI) and dry-matter accumulation, and also superior in phenology, effective tillers/m2, grains/panicle and grain weight as compared to 7 July and 17 July planting. Further, grain yield, net returns, benefit: cost ratio and nutrient uptake were significantly increased by 27 June transplanting over rest of the dates of transplanting. Of the rice cultivars, ‘PHB 71’ exhibited significantly higher growth parameters, phenology, yield attributes, yield, net returns, benefit: cost ratio and nutrient uptake over ‘Pusa RH 10’. The 10-day-old seedlings registered 12.9% and 6.4% higher grain yield than seedlings of 14 days and 18 days by significant improvement in growth parameters, and nutrient uptake. Rice ‘PHB 71’ transplanted on 27 June with 10-day-old seedlings exhibited 33.9% higher grain yield over the transplanting on 17 July of 18-day-old seedlings. Moreover, aromatic hybrid rice ‘Pusa RH 10’ planted on 27 June with 10-day-old seedlings improved grain yield by 38.3% as compared to it planted on 17 July with 18-day-old seedlings. © 2017, Indian Society of Agronomy. All rights reserved.
Response of rice (Oryza sativa) hybrids to integrated nitrogen management under different methods of cultivation
(Indian Society of Agronomy, 2016) A.L. Jat; V.K. Srivastava; Avijit Sen; J.S. Bohra; B.R. Maurya; Rajesh Kumar Singh
A field experiment was conducted during the rainy (kharif) seasons of 2012 and 2013 at Varanasi, Uttar Pradesh, to study the effect of integrated nitrogen management on performance of rice (Oryza sativa L.) hybrids under different methods of cultivation on sandy clay-loam soil. The experiment was laid out in a split-plot design with 2 crop-establishment methods and 2 hybrids assigned to main plots, and 6 integrated nitrogen-management treatments were allocated in subplots and replicated thrice. Transplanting of rice under system of rice intensification (SRI) and rice cv. ‘Arize 6444’ recorded significantly higher growth attributes, viz. plant height, tillers/hill, leaf-area index, and dry-matter accumulation/hill, with almost all yield-attributing characters and yield, except plant height and panicle length which were significantly higher ‘PHB 71’ than ‘Arize 6444’. The SRI planting increased the grain and straw yield by 14.76% and 13.11% over normal transplanting. Similarly, SRI planting and ‘Arize 6444’ cultivar also gave significantly maximum benefit in respect to gross returns, net returns (66,138 and 61,535/ha) and benefit: cost ratio (1.86 and 1.66) over normal transplanting and ‘PHB 71’. Among all the integrated nitrogen-management treatments, application of 50% recommended dose of nitrogen (RDN) + 50% N through FYM + Azospirillum recorded significantly higher growth attributes, yield attributes, grain yield (6.94 t/ha), straw yield (9.16 t/ha), harvest index, net monetary returns (68,064/ha), but application of 125% RDN was found economically feasible in respect to benefit: cost ratio (1.88) owing to lower cost of cultivation. © 2017, Indian Society of Agronomy. All rights reserved.