Browsing by Author "Arup Layek"

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Nitrogen and zinc scheduling for productivity and profitability in direct-seeded rice (Oryza sativa)
(Indian Society of Agronomy, 2017) Rajendra Prasad Meena; S.K. Prasad; Arup Layek; M.K. Singh; Kiran Hingonia
A field experiment was conducted during the rainy (kharif) season of 2014 at Varanasi, Uttar Pradesh, to study the effect of nitrogen levels and zinc application on yield and zinc content of direct-seeded (Oryza sativa L.) rice (DSR). Among the different nitrogen levels, the application of 150 kg N/ha recorded the highest yield attributes, viz. effective tillers at harvesting (77 running /m), panicle length (24.75 cm), grains/panicle (205), test weight (22.47 g) and panicle weight (2.4 g), which resulted in the highest grain (4.34 t/ha) and biological yield (10.08 t/ ha). Among different zinc schedules; the application of 0.3% ZnSO4.H2O spray at anthesis recorded the highest yield attributes, viz. effective tillers at harvesting (72 running/ m), panicle length (24.11 cm), grains/panicle (202), test weight (21.48 g) and panicle weight (2.73 g), resulting in highest grain (4.36 t/ha) and biological yield (10.27 t/ ha). Harvest index was also influenced by nitrogen levels but not by zinc scheduling, although it was found non-significant. However, the highest net returns ( 41.27 × 103/ha) and benefit: cost ratio (1.04) were recorded with the application of 150 kg N/ha, while in case of zinc scheduling the maximum net returns ( 43.27 × 103/ha) and benefit: cost ratio (1.10) were reported with the application of 0.3% ZnSO4. H2O spray at anthesis. Combine application of 150 kg N/ha and 0.3% ZnSO4.H2O spray at anthesis was found optimum for grain yield (5.58 t/ha) of direct-seeded rice. © 2018, Indian Society of Agronomy. All rights reserved.
Nitrogen and zinc scheduling for zinc biofortification in direct seeded rice (Oryza sativa)
(Indian Council of Agricultural Research, 2018) Rajendra Prasad Meena; S.K. Prasad; Arup Layek; M.K. Singh; Mishan Das
[No abstract available]
Phenophase-based nitrogen and zinc scheduling for agronomic zinc biofortification and indices of wheat (Triticum aestivum)
(Indian Society of Agronomy, 2017) Arup Layek; Saroj Kumar Prasad; Manoj Kumar Singh; Sunil Kumar Verma; Rajendra Prasad Meena
A field experiment was conducted during winter (rabi) season of 2012–13 at Varanasi, Uttar Pradesh, to access nitrogen and zinc management on wheat (Triticum aestivum L.) phenophase (Zadoks scale) to increase yield, grain zinc content (agronomic biofortification) and agronomic indices of wheat. The experiment was laid out in a randomized block design (factorial) with 4 nitrogen scheduling [0 kg N/ha, 50% recommended dose of nitrogen (RDN) at sowing + 50% RDN at Z20, 50% RDN at sowing + 25% RDN at Z20 + 25% RDN at Z30 and 50% RDN at sowing + 25% RDN at Z20 + 25% RDN at Z37 ) and 4 zinc scheduling (0 kg Zn/ha, 0.5% Zn-EDTA spray at Z45, 0.25% Zn-EDTA spray at Z45 + 0.25% Zn-EDTA spray at Z60 and 0.25% Zn-EDTA spray at Z45 + 0.25% Zn-EDTA spray at Z73 ). Nitrogen scheduling (50% RDN at sowing + 50% RDN at Z20) and zinc scheduling (0.5% Zn-EDTA spray at Z45) recorded significantly higher effective tillers, 1,000-grain weight, yield, zinc uptake, partial factor productivity (PEP), agronomic efficiency (AE) and recovery efficiency (RE) over the other treatments. Nitrogen and zinc management also positively interacted and recorded higher effective tillers, grain yield, and nitrogen and zinc uptake with N1 × Zn1; however, the maximum grain zinc content (52.30 mg/kg) was recorded with N3 × Zn2 combination. © 2018, Indian Society of Agronomy. All rights reserved.