Browsing by Author "S.K. Prasad"

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Agri-horti system compatibility and weed management for enhancing sesame (Sesamum indicum) production under vindhyan region of eastern uttar pradesh
(Indian Society of Agronomy, 2018) Rishi Kumar Gupta; M.K. Singh; Madhushree Dutta; S.K. Prasad
An experiment was conducted during the rainy season of 2015 at South Campus, Banaras Hindu University, Mirzapur, Uttar Pradesh, to study the effect of 3 agri-horticultural systems, viz. guava (Psidium guajava L.), custard apple (Annona squamosa L.) and open field, and 4 weed-management practices (pendimethalin 750g a.i/ha + hand-weeding (30 DAS); imazethapyr 75g a.i/ha (PoE) + intercultivation (IC) (45 DAS); quizalafop ethyl 40 g a.i/ha (PoE) + IC (45 DAS); and weedy check) on sesame (Sesamum indicum L.). Guava agri-horti system recorded higher plant height, biomass, capsule count and seed yield and also recorded less infestation of total weeds; whereas open field recorded the highest weed infestation. Pendimethalin recorded the highest weed-control efficiency (94.9% on density basis and 92.6% on biomass basis) at 40 DAS but reverse results observed after intercultivation as quizalofop-ethyl recorded significantly the lowest infestation of weed and recorded the highest plant biomass, capsule content, test weight and seed yield of sesame. In our study, guava proved a compatible agri-horti system for introduction of sesame and quizalofop ethyl 40 g a.i/ha (PoE) + IC (45 DAS) treatment as best for management of weeds and enhancing productivity. © 2018, Indian Society of Agronomy. All rights reserved.
Biosorptive behavior of mango (Mangifera indica) and neem (Azadirachta indica) barks for 134Cs from aqueous solutions: A radiotracer study
(2007) S.P. Mishra; D. Tiwari; S.K. Prasad; R.S. Dubey; M. Mishra
The role of dead biomasses viz., mango (Mangifera indica) and neem (Azadirachta indica) bark samples are assessed in the removal behavior of, one of important fission fragments, Cs(I) from aqueous solutions employing a radiotracer technique. The batch type studies were carried out to obtain various physico-chemical data. It is to be noted that the increase in sorptive concentration (from 1.0·10-8 to 1.0·10-2 mol·dm-3), temperature (from 298 to 328 K) and pH (2.6 to 10.3) apparently favor the uptake of Cs(I) by these two bark samples. The concentration dependence data obeyed Freundlich adsorption isotherm and the uptake follows first order rate law. Thermodynamic data evaluation and desorption experiments reveal the adsorption to be irreversible and endothermic in nature proceeding through ion-exchange and surface complexation for both dead biomasses. Both bark samples showed a fairly good radiation stability in respect of adsorption uptake of Cs(I) when irradiated with a 300 mCi (Ra-Be) neutron source having an integral neutron flux of ∼3.85·10 6 n·cm-2·s-1 and associated with a nominal γ-dose of ∼1.72 Gy·h-1. © 2007 Akadémiai Kiadó.
Challenges in QCD matter physics --The scientific programme of the Compressed Baryonic Matter experiment at FAIR
(Springer New York LLC, 2017) T. Ablyazimov; A. Abuhoza; R.P. Adak; M. Adamczyk; K. Agarwal; M.M. Aggarwal; Z. Ahammed; F. Ahmad; N. Ahmad; S. Ahmad; A. Akindinov; P. Akishin; E. Akishina; T. Akishina; V. Akishina; A. Akram; M. Al-Turany; I. Alekseev; E. Alexandrov; I. Alexandrov; S. Amar-Youcef; M. Anđelić; O. Andreeva; C. Andrei; A. Andronic; Yu. Anisimov; H. Appelshäuser; D. Argintaru; E. Atkin; S. Avdeev; R. Averbeck; M.D. Azmi; V. Baban; M. Bach; E. Badura; S. Bähr; T. Balog; M. Balzer; E. Bao; N. Baranova; T. Barczyk; D. Bartoş; S. Bashir; M. Baszczyk; O. Batenkov; V. Baublis; M. Baznat; J. Becker; K.-H. Becker; S. Belogurov; D. Belyakov; J. Bendarouach; I. Berceanu; A. Bercuci; A. Berdnikov; Y. Berdnikov; R. Berendes; G. Berezin; C. Bergmann; D. Bertini; O. Bertini; C. Beşliu; O. Bezshyyko; P.P. Bhaduri; A. Bhasin; A.K. Bhati; B. Bhattacharjee; A. Bhattacharyya; T.K. Bhattacharyya; S. Biswas; T. Blank; D. Blau; V. Blinov; C. Blume; Yu. Bocharov; J. Book; T. Breitner; U. Brüning; J. Brzychczyk; A. Bubak; H. Büsching; T. Bus; V. Butuzov; A. Bychkov; A. Byszuk; Xu Cai; M. Cãlin; Ping Cao; G. Caragheorgheopol; I. Carević; V. Cătănescu; A. Chakrabarti; S. Chattopadhyay; A. Chaus; Hongfang Chen; LuYao Chen; Jianping Cheng; V. Chepurnov; H. Cherif; A. Chernogorov; M.I. Ciobanu; G. Claus; F. Constantin; M. Csanád; N. D’Ascenzo; Supriya Das; Susovan Das; J. de Cuveland; B. Debnath; D. Dementiev; Wendi Deng; Zhi Deng; H. Deppe; I. Deppner; O. Derenovskaya; C.A. Deveaux; M. Deveaux; K. Dey; M. Dey; P. Dillenseger; V. Dobyrn; D. Doering; Sheng Dong; A. Dorokhov; M. Dreschmann; A. Drozd; A.K. Dubey; S. Dubnichka; Z. Dubnichkova; M. Dürr; L. Dutka; M. Dželalija; V.V. Elsha; D. Emschermann; H. Engel; V. Eremin; T. Eşanu; J. Eschke; D. Eschweiler; Huanhuan Fan; Xingming Fan; M. Farooq; O. Fateev; Shengqin Feng; S.P.D. Figuli; I. Filozova; D. Finogeev; P. Fischer; H. Flemming; J. Förtsch; U. Frankenfeld; V. Friese; E. Friske; I. Fröhlich; J. Frühauf; J. Gajda; T. Galatyuk; G. Gangopadhyay; C. García Chávez; J. Gebelein; P. Ghosh; S.K. Ghosh; S. Gläßel; M. Goffe; L. Golinka-Bezshyyko; V. Golovatyuk; S. Golovnya; V. Golovtsov; M. Golubeva; D. Golubkov; A. Gómez Ramírez; S. Gorbunov; S. Gorokhov; D. Gottschalk; P. Gryboś; A. Grzeszczuk; F. Guber; K. Gudima; M. Gumiński; A. Gupta; Yu. Gusakov; Dong Han; H. Hartmann; Shue He; J. Hehner; N. Heine; A. Herghelegiu; N. Herrmann; B. Heß; J.M. Heuser; A. Himmi; C. Höhne; R. Holzmann; Dongdong Hu; Guangming Huang; Xinjie Huang; D. Hutter; A. Ierusalimov; E.-M. Ilgenfritz; M. Irfan; D. Ivanischev; M. Ivanov; P. Ivanov; Valery Ivanov; Victor Ivanov; Vladimir Ivanov; A. Ivashkin; K. Jaaskelainen; H. Jahan; V. Jain; V. Jakovlev; T. Janson; Di Jiang; A. Jipa; I. Kadenko; P. Kähler; B. Kämpfer; V. Kalinin; J. Kallunkathariyil; K.-H. Kampert; E. Kaptur; R. Karabowicz; O. Karavichev; T. Karavicheva; D. Karmanov; V. Karnaukhov; E. Karpechev; K. Kasiński; G. Kasprowicz; M. Kaur; A. Kazantsev; U. Kebschull; G. Kekelidze; M.M. Khan; S.A. Khan; A. Khanzadeev; F. Khasanov; A. Khvorostukhin; V. Kirakosyan; M. Kirejczyk; A. Kiryakov; M. Kiš; I. Kisel; P. Kisel; S. Kiselev; T. Kiss; P. Klaus; R. Kłeczek; Ch. Klein-Bösing; V. Kleipa; V. Klochkov; P. Kmon; K. Koch; L. Kochenda; P. Koczoń; W. Koenig; M. Kohn; B.W. Kolb; A. Kolosova; B. Komkov; M. Korolev; I. Korolko; R. Kotte; A. Kovalchuk; S. Kowalski; M. Koziel; G. Kozlov; V. Kozlov; V. Kramarenko; P. Kravtsov; E. Krebs; C. Kreidl; I. Kres; D. Kresan; G. Kretschmar; M. Krieger; A.V. Kryanev; E. Kryshen; M. Kuc; W. Kucewicz; V. Kucher; L. Kudin; A. Kugler; Ajit Kumar; Ashwini Kumar; L. Kumar; J. Kunkel; A. Kurepin; N. Kurepin; A. Kurilkin; P. Kurilkin; V. Kushpil; S. Kuznetsov; V. Kyva; V. Ladygin; C. Lara; P. Larionov; A. Laso García; E. Lavrik; I. Lazanu; A. Lebedev; S. Lebedev; E. Lebedeva; J. Lehnert; J. Lehrbach; Y. Leifels; F. Lemke; Cheng Li; Qiyan Li; Xin Li; Yuanjing Li; V. Lindenstruth; B. Linnik; Feng Liu; I. Lobanov; E. Lobanova; S. Löchner; P.-A. Loizeau; S.A. Lone; J.A. Lucio Martínez; Xiaofeng Luo; A. Lymanets; Pengfei Lyu; A. Maevskaya; S. Mahajan; D.P. Mahapatra; T. Mahmoud; P. Maj; Z. Majka; A. Malakhov; E. Malankin; D. Malkevich; O. Malyatina; H. Malygina; M.M. Mandal; S. Mandal; V. Manko; S. Manz; A.M. Marin Garcia; J. Markert; S. Masciocchi; T. Matulewicz; L. Meder; M. Merkin; V. Mialkovski; J. Michel; N. Miftakhov; L. Mik; K. Mikhailov; V. Mikhaylov; B. Milanović; V. Militsija; D. Miskowiec; I. Momot; T. Morhardt; S. Morozov; W.F.J. Müller; C. Müntz; S. Mukherjee; C.E. Muñoz Castillo; Yu. Murin; R. Najman; C. Nandi; E. Nandy; L. Naumann; T. Nayak; A. Nedosekin; V.S. Negi; W. Niebur; V. Nikulin; D. Normanov; A. Oancea; Kunsu Oh; Yu. Onishchuk; G. Ososkov; P. Otfinowski; E. Ovcharenko; S. Pal; I. Panasenko; N.R. Panda; S. Parzhitskiy; V. Patel; C. Pauly; M. Penschuck; D. Peshekhonov; V. Peshekhonov; V. Petráček; M. Petri; M. Petriş; A. Petrovici; M. Petrovici; A. Petrovskiy; O. Petukhov; D. Pfeifer; K. Piasecki; J. Pieper; J. Pietraszko; R. Płaneta; V. Plotnikov; V. Plujko; J. Pluta; A. Pop; V. Pospisil; K. Poźniak; A. Prakash; S.K. Prasad; M. Prokudin; I. Pshenichnov; M. Pugach; V. Pugatch; S. Querchfeld; S. Rabtsun; L. Radulescu; S. Raha; F. Rami; R. Raniwala; S. Raniwala; A. Raportirenko; J. Rautenberg; J. Rauza; R. Ray; S. Razin; P. Reichelt; S. Reinecke; A. Reinefeld; A. Reshetin; C. Ristea; O. Ristea; A. Rodriguez Rodriguez; F. Roether; R. Romaniuk; A. Rost; E. Rostchin; I. Rostovtseva; Amitava Roy; Ankhi Roy; J. Rożynek; Yu. Ryabov; A. Sadovsky; R. Sahoo; P.K. Sahu; S.K. Sahu; J. Saini; S. Samanta; S.S. Sambyal; V. Samsonov; J. Sánchez Rosado; O. Sander; S. Sarangi; T. Satława; S. Sau; V. Saveliev; S. Schatral; C. Schiaua; F. Schintke; C.J. Schmidt; H.R. Schmidt; K. Schmidt; J. Scholten; K. Schweda; F. Seck; S. Seddiki; I. Selyuzhenkov; A. Semennikov; A. Senger; P. Senger; A. Shabanov; A. Shabunov; Ming Shao; A.D. Sheremetiev; Shusu Shi; N. Shumeiko; V. Shumikhin; I. Sibiryak; B. Sikora; A. Simakov; C. Simon; C. Simons; R.N. Singaraju; A.K. Singh; B.K. Singh; C.P. Singh; V. Singhal; M. Singla; P. Sitzmann; K. Siwek-Wilczyńska; L. Škoda; I. Skwira-Chalot; I. Som; Guofeng Song; Jihye Song; Z. Sosin; D. Soyk; P. Staszel; M. Strikhanov; S. Strohauer; J. Stroth; C. Sturm; R. Sultanov; Yongjie Sun; D. Svirida; O. Svoboda; A. Szabó; R. Szczygieł; R. Talukdar; Zebo Tang; M. Tanha; J. Tarasiuk; O. Tarassenkova; M.-G. Târzilă; M. Teklishyn; T. Tischler; P. Tlustý; T. Tölyhi; A. Toia; N. Topil’skaya; M. Träger; S. Tripathy; I. Tsakov; Yu. Tsyupa; A. Turowiecki; N.G. Tuturas; F. Uhlig; E. Usenko; I. Valin; D. Varga; I. Vassiliev; O. Vasylyev; E. Verbitskaya; W. Verhoeven; A. Veshikov; R. Visinka; Y.P. Viyogi; S. Volkov; A. Volochniuk; A. Vorobiev; Aleksey Voronin; Alexander Voronin; V. Vovchenko; M. Vznuzdaev; Dong Wang; Xi-Wei Wang; Yaping Wang; Yi Wang; M. Weber; C. Wendisch; J.P. Wessels; M. Wiebusch; J. Wiechula; D. Wielanek; A. Wieloch; A. Wilms; N. Winckler; M. Winter; K. Wiśniewski; Gy. Wolf; Sanguk Won; Ke-Jun Wu; J. Wüstenfeld; Changzhou Xiang; Nu Xu; Junfeng Yang; Rongxing Yang; Zhongbao Yin; In-Kwon Yoo; B. Yuldashev; I. Yushmanov; W. Zabołotny; Yu. Zaitsev; N.I. Zamiatin; Yu. Zanevsky; M. Zhalov; Yifei Zhang; Yu Zhang; Lei Zhao; Jiajun Zheng; Sheng Zheng; Daicui Zhou; Jing Zhou; Xianglei Zhu; A. Zinchenko; W. Zipper; M. Żoładź; P. Zrelov; V. Zryuev; P. Zumbruch; M. Zyzak
Substantial experimental and theoretical efforts worldwide are devoted to explore the phase diagram of strongly interacting matter. At LHC and top RHIC energies, QCD matter is studied at very high temperatures and nearly vanishing net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was created at experiments at RHIC and LHC. The transition from the QGP back to the hadron gas is found to be a smooth cross over. For larger net-baryon densities and lower temperatures, it is expected that the QCD phase diagram exhibits a rich structure, such as a first-order phase transition between hadronic and partonic matter which terminates in a critical point, or exotic phases like quarkyonic matter. The discovery of these landmarks would be a breakthrough in our understanding of the strong interaction and is therefore in the focus of various high-energy heavy-ion research programs. The Compressed Baryonic Matter (CBM) experiment at FAIR will play a unique role in the exploration of the QCD phase diagram in the region of high net-baryon densities, because it is designed to run at unprecedented interaction rates. High-rate operation is the key prerequisite for high-precision measurements of multi-differential observables and of rare diagnostic probes which are sensitive to the dense phase of the nuclear fireball. The goal of the CBM experiment at SIS100 (sNN= 2.7--4.9 GeV) is to discover fundamental properties of QCD matter: the phase structure at large baryon-chemical potentials (μB> 500 MeV), effects of chiral symmetry, and the equation of state at high density as it is expected to occur in the core of neutron stars. In this article, we review the motivation for and the physics programme of CBM, including activities before the start of data taking in 2024, in the context of the worldwide efforts to explore high-density QCD matter. © 2017, SIF, Springer-Verlag Berlin Heidelberg.
Contributions to the palaeozoic and mesozoic of the Himalaya
(Indian National Science Academy, 2020) O.N. Bhargava; Birendra P. Singh; B. Pandey; J.A. Ganai; G.M. Bhat; S.K. Prasad; R.A. Rashid
[No abstract available]
Effect of mulching and herbicides on weeds, yield and economics of greengram (Vigna radiata L.) grown under eight-year old agrihorti system
(Gaurav Publications, 2017) S.K. Verma; S.K. Prasad; Sushil Kumar; S.B. Singh; Ravi Prakash Singh; Y.V. Singh
A field experiment with the objectives to understand the effect of mulching and herbicides on weed infestation and greengram yield involving two factors viz., mulching (no mulching, dust mulching and paddy straw mulching) and herbicidal treatments (weedy check, hand weeding at 20 and 40 days after sowing, pendimethalin pre-emergence @1000 g/ha, imazethapyr post-emergence @ 100 g/ha, and pendimethalin pre-emergence @ 1000 g/ha followed by imazethapyr post-emergence @ 100 g/ha) was undertaken in splitplot design with three replications at South Campus, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India. Results revealed that dust mulching and sequential application of pendimethalin followed by imazethapyr recorded lower weed density, weed dry weight, nutrients depletion by weed and maximum crop yield as well as net returns over rest of the mulching and herbicidal treatments. Therefore, it is suggested that the combination of mulching and herbicides may be used for effective weed management and optimal yield of greengram under agri-horti system.
Effect of nitrogen and zinc fertilizer on zn biofortification in pearlmillet (Pennisetum glaucum)
(Indian Society of Agronomy, 2014) Renu Singh; S.K. Prasad; M.K. Singh
A field experiment was conducted during the rainy (kharif) season of 2011–12 at Mirzapur, Uttar Pradesh to study the response of pearlmillet [Pennisetum glaucum (L.) R. Br.] to nitrogen and zinc on Zn biofortification in this crop. The field experiment was laid out in a factorial randomized block design, with 3 replications, comprising 4 nitrogen (N) levels (0, 20, 40 and 60 kg N/ha) and 3 levels of zinc (0, 5 and 10 kg Zn/ha) with constant rates of phosphorus and potassium at 40 and 30 kg/ha respectively. Application of 60 kg N/ha and 10 kg Zn/ha resulted in the maximum grain yield, N content and uptake by grain and stover of pearlmillet. Zinc content in grain linearly enhanced with sole application of N and Zn levels up to 20 kg N/ha and 5 kg Zn/ha. Combined application of 5 kg Zn/ ha × 20 kg N/ha was found optimum for enhancement of Zn content in grains of pearlmillet. Agronomic nitrogen and zinc efficiency decreased with the increasing nitrogen and zinc levels. © 2014, Indian Society of Agronomy. All rights reserved.
Effect of panchagavya and recommended dose of fertilizers on growth, nutrient content and productivity of transplanted rice (Oryza sativa) under middle Gangetic plain of India
(Indian Council of Agricultural Research, 2018) P.K. Upadhyay; Avijit Sen; S.K. Prasad; Yashwant Singh; J.P. Srivastava; S.P. Singh; R.K. Singh
A field trial was conducted at the Agricultural Research Farm, Banaras Hindu University during 2013-14 and 2014-15 to study the effect of time and rate of panchagavya application and recommended dose of fertilizers (RDF) on growth, nutrient content and productivity of transplanted rice (Oryza sativa L.). Interaction of panchagavya and RDF exhibited significant effect on dry matter accumulation, productive tillers/m2 as well as grain and straw yields of rice. Enhancement by 42% in the number of productive tillers/m2 and 33% in grain yield was observed with the combination of D4 (seedling root dip + one spray at 30 DAT @ 6% + application through irrigation water at 60 DAT) + 100% RDF over 60%RDF without panchagavya. Application of panchagavya (D4) significantly increased nitrogen, phosphorus and potassium content in grain and straw following higher total uptake of these elements.120% RDF significantly increased the N, P and K content in grain and straw over 60, 80 and 100% RDF. Productive tillers/m2, panicle length and filled spikelets/panicle showed linear response with yield. Residual effect of panchagavya (D4) in combination with 100% RDF recorded 27% increment in the yield of lentil. © 2018 Indian Council of Agricultural Research. All rights reserved.
Effect of timed administration of neurotransmitter precursor drugs on testicular activity, body weight and plumage pigmentation in the lal munia Estrilda amandava
(1994) C.M. Chaturvedi; R. Bhatt; S.K. Prasad
Daily injections of L-dihydroxyphenylalanine (L-DOPA, a dopamine precursor) given 12 hr after 5-hydroxytryptophan (5-HTP, a serotonin precursor) during quiescent and progressive phase of annual breeding cycle induced testicular growth, body weight gain and nuptial plumage in autumn breeding sedentary finch E. amandava which exhibits parallel gonadal and body weight cycle. Daily injection of these drugs when given 8 hr apart during progressive phase led to opposite effects in all parameters (testicular growth, body weight and nuptial plumage). Results indicate that 12 hr and 8 hr relationship of neurotransmitter precursor drugs (5HTP and L-DOPA) might have stimulated/inhibited the activity of neuroendocrine-gonadal axis. The findings support the hypothesis that specific phase relation of circadian serotonergic and dopaminergic oscillations account for seasonal reproductive function in lal munia.
Effect of weed control measures on weeds, nodulation, growth and yield of mungbean (Vigna radiata)
(Indian Society of Agronomy, 2013) Panch Ram Mirjha; S.K. Prasad; M.K. Singh; Ram Hari Paikra; Suryakant Patel; Mithu Majumdar
A field experiment was conducted at Varanasi, Uttar Pradesh during the rainy (kharif) season of 2009, to study the effect of different weed-control measures on mungbean {Vigna radiata (L.) Wilczek}. Weed-control treatments significantly increased the grain yield of mungbean over weedy check. Weedy condition for the entire crop season reduced the grain yield by 40.4% (0.589 tonnes/ha) compared to hand-weeding (HW) twice at 20 and 40 days after sowing (0.989 tonnes/ha). Hand-weeding at 20 and 40 days after sowing (DAS) also recorded maximum number of branches/plant, weed-control efficiency, shoot dry weight/plant, nodules number and dry weight/plant followed by post emergence (PoE) application of fenoxaprop-p-ethyl 50 g/ha + chlorimuron-ethyl 4 g/ha. Highest benefit: cost ratio was obtained with the fenoxaprop-p-ethyl 50 g/ha + chlorimuron-ethyl 4 g/ha (PoE). © 2013, Indian Society of Agronomy. All rights reserved.
Effects of specific phase relation of serotonergic and dopaminergic drugs on the annual reproductive cycle of spotted munia, Lonchura punctulata
(Triveni Enterprises, 1998) S.K. Prasad; C.M. Chaturvedi
A study of the temporal synergism of serotonergic and dopaminergic drugs in the regulation of seasonality of Indian wild finch, spotted Munia was undertaken. Results indicate that specific phase relationships of serotonergic and dopaminergic activities induced specific seasonal conditions and has similar effect in all the four phases of reproductive cycle. 8-hr temporal relation always induced suppression of increasing or increased gonadal activity. On the other hand, 12-hr relation induced early recrudescence in quiescent phase, increased the rate of growth in progressive phase, maintained higher degree of development in breeding phase and the regression was completely eliminated in postreproductive regressive phase. Body weight also responded in the same way suggesting that these two temporal relationship did not produce any direct effect on the gonad. But, actually affected seasonality of the bird i.e. inducing concurrent increases or decrease in body weight and gonadal growth as occurs in nature (parallel relationship between gonad and body weight cycle) during different phases of annual cycle.
Growth, yield and economics of fodder crops to varying npk levels in a guava based horti-pastoral system
(Plant Archives, 2020) Nirpendra Kumar; S.P. Singh; Sant Prasad; S.K. Prasad; Tikendra Kumar Yadav
The growth, yield and economics of rainfed fodder crops (pearl millet, sorghum and Sudan grass) as influenced by with four NPK levels viz. control, 75%, 100% and 125% recommended dose of fertilizers (RDF) was evaluated in a horti-pastoral system. Experiment was laid out in a randomized complete block design replicated thrice. Among the test crops, pearl millet gave significantly higher values of plant height, number of nodes plant-1, green leaves plant-1, leaf area index, shoot weight plant-1 (fresh and dry) and fodder yield. Application of 125 % RDF also resulted significantly higher values of above parameters than rest of the NPK levels except 100% RDF. Fodder pearl millet accrued highest gross returns, net returns and B: C ratio with use of 125% RDF. © 2020 Plant Archives. All rights reserved.
Influence of irrigation regimes and weed management practices on water use and nutrient uptake in wheat (Triticum aestivum L. Emend. Fiori and Paol.)
(Bangladesh Botanical Society, 2015) S.K. Verma; S.B. Singh; S.K. Prasad; R.N. Meena; R.S. Meena
A field experiment was conducted in sandy clay loam soil during winter season of 2012-13. The lowest weed dry weight and the highest nutrient content were recorded under 80 mm CPE. Significantly the highest grain and straw yield, total nutrients uptake, and the highest consumptive use of water (57.8 cm), rate of water use (4.52 mm/day), water use efficiency (87.3 kg/ha-cm) and soil profile moisture was extracted with irrigation at 40 mm CPE. Application of sulfosulfuron recorded significantly lowest weed biomass and the highest nutrient content and their uptake, grain and straw yield, and maximum consumptive use of water (51.5 cm), rate of water use (4.02 mm/day), water use efficiency (91.3 kg/ha-cm) and soil profile moisture extraction over metribuzin and it was at par with metsulfuron-methyl. Grain (6.57 kg/ha) and straw yield (12.3 kg/ha) will be reduced by an increased in unit dry matter production in weeds. © 2015 Bangladesh Botanical Society. All rights reserved.
Influence of varieties and organic mulches on weed-suppressive ability, growth and yield of spring wheat
(Enviro Media, 2016) Diwakar Mani; M.K. Singh; S.K. Prasad
Weeds are the major obstacles for enhancing wheat productivity. Rise in herbicide resistant weeds and shift in weed flora, warrants urgent attention on non-chemical approaches of weed management. Keeping these in view, a factorial experiment was conducted in randomized complete block design, during winter season of 2012-13. The treatments comprised of five wheat varieties [C-306, K-8027, K-0307, DBW-39 and HD-2888] and four mulching [No-mulch, rice straw (RS) 6 t/ha, maize straw (MS) 6 t/ha, and saw dust (SD) 6 t/ha] treatments. Among tested wheat varieties, DBW-39 and K-0307 smoother predominant weeds, reduced total weed density (20-40 per cent) and biomass (22-31 per cent); besides, they also showed higher plant height, population (especially during critical period of crop-weed competition) and test weight. DBW-39 produced higher yield to the tune of 2539 per cent over other varieties. Surface application of RS and MS mulches reduced the growth of predominant weeds, like Chenopodium album, Melilotus alba, and Phalaris minor, along with reduced density and biomass of total weed by nearly 50.0 per cent over no-mulch control. Furthermore, application of RS and MS produced 34.0 and 28.0 per cent higher yield over no-mulch. SD mulch was not effective in weed suppression and enhancing yield. Copyright © EM International.
Inorganic particulates in removal of toxic heavy metal ions: Part X: Removal behavior of aluminum hydroxide for Hg(II): A radiotracer study
(2007) S.P. Mishra; D. Tiwari; S.K. Prasad; R.S. Dubey; Manisha Mishra
The removal behavior of amorphous aluminum hydroxide for Hg(II) ions from aqueous solutions was investigated by employing a radiotracer technique at micro down to trace level concentrations. The batch type experiments were performed to obtain various physico-chemical parameters, viz., effect of sorptive concentration, temperature and pH. It was observed that the increase in sorptive concentration (from 1.10-8 to 1.10-2 mol·dm -3), temperature (from 303 to 333K) and pH (from 3.4 to 10.3) apparently favored the uptake of Hg(II) by this solid. Similarly, the presence of anions (six fold) viz., oxalate, phosphate, glycine and EDTA also enhanced the uptake behavior of aluminum hydroxide for Hg(II). Whereas, the added cations viz., Na+, K+, Ba2+, Sr2+, Mg 2+, Cd2+ and Fe3+ more or less suppressed the removal behavior of the adsorbent. Further, the adsorption process followed the classical Freundlich adsorption isotherm and deductions of various thermodynamic data revealed that the uptake of Hg(II) on aluminum hydroxide followed the ion-exchange type mechanism and thermodynamically it was found to be endothermic in nature. © 2007 Springer Science+Business Media, Inc.
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 yield and zinc biofortification of direct-seeded rice (Oryza sativa)
(Indian Society of Agronomy, 2021) Sandeep Kumar; S.K. Prasad; Pooja; M.K. Singh; Rajendra Prasad Meena
A field experiment was conducted during the rainy (kharif) season of 2015 at Varanasi, Uttar Pradesh, to assess the effect of phenophase-based nitrogen and zinc scheduling on yield, and zinc content of direct-seeded rice (Oryza sativa L.). The experiment was laid out in a factorial randomized block design with 3 replications, having 3 nitrogen levels (N0, 0 kg N/ha; N1, 120 kg N/ha (50% at sowing + 25% at G+ 25% at G ); N, 160 kg N/ha (50% 21 32 2 at sowing + 25% at G21 + 25% at G32 ) and 5 zinc scheduling (Zn0, 0 kg Zn/ha; Zn1, 5 kg Zn/ha basal + 0.3% ZnSO4 . H2 O spray at G45 and G61; Zn2, 10 kg Zn/ha basal + 0.3% ZnSO4 . H2 O spray at G45 and G 61; Zn3, 5 kg Zn/ ha basal + 0.3 % ZnSO4 . H2 O spray at G51 + G73; Zn4, 10 kg Zn/ha at basal + 0.3% ZnSO4 . 2H2 O spray at G51 + G73 ). Significantly highest effective tillers, panicle length, grains/panicle, panicle weight, 1,000–grain weight, grain and biological yields were recorded with independent application of N2 and Zn2 over the others, however the highest zinc content and uptake in grain recorded with N2 and Zn4 treatments. Nitrogen levels and Zn scheduling also positively interacted and recorded the highest grain yield with N2 × Zn2, however the highest grain N and Zn content were recorded with N2 × Zn4 . © 2021, Indian Society of Agronomy. All rights reserved.
Productivity and water use efficiency of bread wheat (triticum aestivum L.) as influenced by irrigation schedule, mulching and hydrogel in eastern indo-gangetic plains of India
(Bangladesh Botanical Society, 2018) S.P. Singh; R.K. Singh; S.K. Prasad; Neelam Bisen
A field experiment was conducted to evaluate the influence of limited and adequate irrigation and moisture conservation practices (rice straw mulch and hydrogel) on yield and water use efficiency in wheat. Though, maximum wheat yield (3.92 t/ha) and water use efficiency (15.72 kg/ha/mm) was recorded with four irrigations at crown root initiation stage, tillering, late jointing, and milk stage, two irrigations applied at tillering and flowering and soil mix drilling of 7.5 kg/ha hydrogel (a synthetic polymer) at sowing produced comparable yield (3.34 t/ha) with less water use, enhancing the water use efficiency (15.45 kg/ha-mm). The higher net return and B : C ratio were found in the treatment 2.5 kg/ha hydrogel. Thus, from present study it may be concluded that under limited irrigation conditions, water conservation practices like soil mix drilling of hydrogel and rice-straw mulching are beneficial for maintaining optimum moisture in soil to enhance wheat yield and water use efficiency. © 2018 Bangladesh Botanical Society. All rights reserved.
Regulation of seasonal reproduction by neurotransmitter affecting drugs in spotted munia, Lonchura punctulata
(2003) S.K. Prasad; C.M. Chaturvedi
Timed daily injection of serotonin precursor, 5-HTP (5-Hydroxytryotophan) and dopamine precursor, L-DOPA (Dihydroxyphenylalanine) determine seasonality in wild finch spotted munia. Lonchura punctulata, which does not utilize photoperiod to tune their seasonal reproduction. These effects are due to serotonergic and dopanunergic activities and not due to serotomn and dopamine alone. Further, L-DOPA was effective when converted into dopamine and not into nor-adrenaline or adrenaline, the next biosynthetic product of dopamine. The findings suggest that seasonal changes in the reproductive functions may be related to seasonal changes in the phase relationship between daily rhythms in serotonergic and dopaininergic activity in the central nervous system.
Response of alley-cropped pearl millet (Pennisetum glaucum) to nitrogen and zinc schedules under semi-arid regions
(Indian Society of Agronomy, 2023) Kamlesh Verma; S.K. Prasad; M.K. Singh; Prashant Sharma
Realizing the importance of tree-based cropping system and scheduling of nitrogen (N) and zinc (Zn) in the semi-arid region, an on-field trial was conducted with pearl millet [Pennisetum glaucum (L.) R. Br.] during the rainy season of 2017 at RGS Campus of Banaras Hindu University, Mirzapur, Uttar Pradesh. The trial was laid out in factorial randomized block design with 4 N and 4 Zn treatment applications in different schedules. The results revealed that, N scheduled at ¼ [basal] + ½ (3rd visible leaf (VL) + ¼ panicle extended in flag-leaf sheath (PEFLS) produced the most synergetic effect on growth and yield of pearl millet. The grain yield increased up to 65% compared to no N application. Conversely, Zn schedules did not significantly influence the growth parameters (except dry-matter), while Zn application at 2.5 kg/ha (basal) + 0.25% panicle initiation (PI) + 0.25% PEFLS recorded about 37% more grain yield, than no Zn application. Additionally, the maximum biological and straw yields recorded with 2.5 kg/ha (basal) + 0.25% panicle emergence (PE) + 0.25% milk stage (MS) Zn application compared to the other treatments. Moreover, N and Zn interacted significantly to produce synergetic effect on the dry-matter, test weight, grain, straw, and biological yields. The maximum grain yield was observed with conjunctive application of N at ¼ [basal] + ½ [3rd VL] + ¼ [PEFLS] and Zn at 2.5 kg/ha [basal] + 0.25% [PI] + 0.25% [PEFLS], whereas the maximum biological and straw yields were recorded with application of the N at ¼ [basal] + ½ [3rd VL] + ¼ [PEFLS] and Zn at 2.5 kg/ha [basal] + 0.25% [PE] + 0.25% [MS]. © 2023, Indian Society of Agronomy. All rights reserved.