Browsing by Author "B.P. Singh"

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A generalized stochastic model for number of events in equilibrium renewal process (ERP)
(2011) V.K. Singh; B.P. Singh
If a system, producing point events has been running for a long time before it is first observed, one obtains an equilibrium renewal process (ERP). Such renewal processes are common in real life experiments where the experimenter enters the system abruptly at a fixed point, a long time after the start of the process and counts the number of events of his interest upto the time point.The present paper is aimed at to develop a generalized model for number of point events in ERP with point state space of the process. Some special cases of the model have been dealt with. Expressions for mean and variance of the model have been obtained for estimating parameters of the model.
Aerosol optical properties over delhi and manora peak during a rare dust event in early april 2005
(Taylor and Francis Ltd., 2011) S.K. Srivastava; M.K. Srivastava; A. Saha; S. Tiwari; S. Singh; U.C. Dumka; B.P. Singh; N.P. Singh
Dust storm events are annual phenomena observed over the Indo-Gangetic plain (IGP) during the pre-monsoon period (May-June). These dust storms affect the air quality, weather conditions and radiation budget of the region. In this paper we characterize the aerosol optical parameters associated with a rare dust storm event that hit the IGP during early April 2005. This event was considered rare as it occurred much earlier than the general occurrence of dust storms in India (May-June), and in the year 2005, the warmest year in the span of the previous hundred years. In this study we considered the optical aerosol parameters for two places in the IGP: Delhi (28.5° N, 77.2° E, 325 m asl) and the high altitude station, Manora Peak (29.4° N, 79.5° E, 1958 m asl). Of the two selected stations, Delhi represents a highly populated and polluted location whereas Manora Peak represents a cleaner location in the central Himalayan region. During this dust storm event, the aerosol optical depth (AOD) was observed to increase considerably. The increment was 2.6-4.6 times over Delhi and 1.6-3.2 times over Manora Peak at wavelengths 380 and 1020 nm, respectively, with respect to the background values, whereas the Ångström exponent (α) for both the stations remained close to zero during the event. The effect shows a considerable increase in direct dust radiative forcing in terms of a reduction in the broadband global irradiance for Delhi as well as for Manora Peak stations. The direct aerosol radiative forcing thus obtained was about 34% in the 400-1100 nm wavelength band at Manora Peak. © 2011 Taylor & Francis.
Application of Geochemical Mapping in Unraveling Paleoweathering and Provenance of Karewa Deposits of South Kashmir, NW Himalaya, India
(Geological Society of India, 2019) Nadeem A. Bhat; B.P. Singh; Aijaz A. Bhat; Som Nath; D.B. Guha
Ninety Six composite stream sediment samples of Karewa deposits from parts of Pulwama and Budgam districts of south Kashmir were analysed for major, trace and rare earth elements to understand the nature of weathering and provenance. A-CN-K and A-CNK-FM plots of the samples indicate almost similar contents in Al 2 O 3 , CaO, Na 2 O, K 2 O and MgO as those of upper crust, reflecting very poor to moderate weathering history. Similarly, the low to moderate chemical index of alteration (CIA) values (33.97 to 68.87), chemical index of weathering (CIW) values (57.68 to 84.80) and plagioclase index of weathering (PIA) values (31.49 to 75.67) suggest a low to moderate intensity of weathering in source area. The discriminant function diagrams revealed quartzose sedimentary provenance, with some of the samples falling in intermediate igneous source, probably reflecting recycled orogen provenance. The sample data show fractionated REE patterns with (La/Yb)cn varying from 7.42 to 9.52 and a negative Eu anomaly 0.64–0.71, is regarded as evidence for a differentiated source. In La–Th–Sc diagram, sediments fall in a region of mixed source rocks with two samples falling in basic source rock area. The samples fall close to the values of UCC, PAAS and NASC, indicating large provenance with variable geographical and geological setting. On La/Th plot, the sediment data fall into the range of UCC, indicating that the sediments did not have a uniform provenance. © 2019, Geological Society of India.
Approaches towards geography of health: A synoptic review
(1976) R.L. Singh; R.P.B. Singh; B.P. Singh
The mechanisms which caused the growth and variation of the diseases within a spatial unit has recently drawn the attention of geographers. In fact, such variations are primarily governed by the socio-economic and behavioural factors - the aspects which are mostly neglected by medical scientists. To emphasize these aspects, a new methodology has been advanced, being expressed as the geo-medical approach. The conclusion derived from such analysis will provide a base for planning postulates so that the health of human beings can be improved through preventive measures rather than medical treatment to a considerable extent.
Atmospheric pCO2 and climate during late Eocene (36 ± 5 Ma) on the Indian subcontinent
(2007) B.P. Singh; Il Lee Yong
This communication highlights the level of atmospheric CO2 and the climatic conditions during Eocene (36 ± 5 Ma) based on measurements of stable carbon and oxygen isotopes of late Eocene soil carbonate (calcretes) occurring in the Himalayan foreland basin sequences. The atmospheric pCO 2 is estimated to be about 930 ppm V at high productivity and about 465 ppm V at low productivity. The covariance of δ18O and δ13C suggests that the higher atmospheric CO2 may be responsible for higher temperature. Moderate weathering intensity (CIA value 70-82) of the host mudstones suggests warm climate associated with reasonable wetness that became dry-subtropical, resulting in calcrete development in the northern part of the Indian subcontinent during late Eocene. Wet subtropical climate demonstrates considerable rainfall at this time interval in the region long before the uplift of the Tibetan plateau. Alternatively, it can be suggested that uplift of the Tibetan plateau began much earlier than presently considered.
Bayes estimation of shape parameter of classical pareto distribution under linex loss function
(Marcel Dekker Inc., 1996) B.N. Pandey; B.P. Singh; C.S. Mishra
The Bayesian estimator for the shape parameter of Pareto distribution using LINEX loss function has been obtained. The properties of the estimator in respect of risk have been studied and it is found that the LINEX estimator is preferable to the squared error estimator for specific values of c nearer to zero. Copyright © 1996 by Marcel Dekker, Inc.
Bhojunda Stromatolite Park (Rajasthan, NW India): a Window to Early Life and a Cry for Geoconservation
(Springer, 2024) M.A. Quasim; Sreepat Jain; Aaisha Naz; B.P. Singh; Iftikhar Ahmad; Mohd Shaif
In India, Rajasthan, the northwestern part of India, possesses geological diversity comparable to its cultural richness. This paper focuses on evaluating a promising geological heritage site in Rajasthan, the Palaeo-Mesoproterozoic Stromatolite Park at Bhojunda (District Chittorgarh). The Bhagwanpura Limestone Formation of the Lower Vindhyan Group hosts well-preserved stromatolites at this geosite. The paper assesses, both qualitatively and quantitatively, the potential of this stromatolite-bearing site and based on the available data and analysis considers it to be a strong candidate for a potential geoheritage site. SWOT analysis also suggests that the site has immense potential but at the same time, is in urgent need of geoconservation. Stromatolites provide valuable insights into the early life on Earth; the Stromatolite Park at Bhojunda holds a significant potential as a Geoheritage site due to its extensive geological exposure. Stromatolites are layered sedimentary structures formed mainly by photosynthetic microorganisms that include cyanobacteria, sulfate-reducing bacteria, and Pseudomonadota. They produce cementing materials that bind sediments (sand and other rocky materials) to form “microbial mats”. In the present study, species from seven genera, namely Conophyton cylindricus, Baicalia baicalica, Collenia columnaris, and Kussiella kussiensis, Tungussia sp., Stratifera rara, and Weedia walcott are recorded suggesting a lower‒middle Riphean age. Petrographically, the Bhagwanpura Limestone is composed of fine grains of calcite and dolomite with dispersed grains of cryptocrystalline silica, iron oxide, chert fragments, and veinlets of quartz and calcite. Present analysis suggests that the Bhojunda Stromatolite Park meets all standards to become a Global Geopark. It is crucial to take the necessary actions to apply for UNESCO confirmation, advocating not just community-driven conservation of the region’s geological heritage but also fostering sustainable development by improving the native tribes’ standard of living. © The Author(s), under exclusive licence to International Association for the Conservation of Geological Heritage 2024.
Bilateral posterior open-bite. Abbreviated case report
(1981) A.K. Kapoor; A.B. Srivastava; B.P. Singh
A case of bilateral posterior open-bite is reported since it is unusual to find the mandibular and maxillary molars on both sides in infraclusion. © 1981.
Biogenic features in calcretes developed on mudstone: Examples from Paleogene sequences of the Himalaya, India
(2007) B.P. Singh; Yong Il Lee; J.S. Pawar; R.S. Charak
Calcrete occurring in the Paleogene sequences of the western Himalayan foreland basin offers very useful information regarding climate and paleogeography of northern part of the Indian subcontinent. These calcretes possess variety of biogenic features (beta fabrics) that include rhizoliths, alveolar septal and vermiform fabric and Microcodium. The Microcodium rosettes show filamentous structures. The rhizoliths and alveolar septal fabric formed by the precipitation of carbonate in soil vadose zone and the vermiform fabric may be a root mat. Perhaps microbes helped in dissolution of carbonate fillings and they were instrumental in precipitation of calcite in the form of rosettes and filaments. Here, the filamentous structure in the Microcodium is significant. We suggest that the Microcodium formed as a result of fungal dissolution and microbial mediation. The lighter values of δ13C and δ18O (< - 8.5‰) in the studied calcretes suggest that they developed through meteoric water in the presence of soil organic matter within the dry subtropical climatic zone when the northern part of the Indian subcontinent moved out of wet equatorial climate during its northward flight. © 2007 Elsevier B.V. All rights reserved.
Chemical behavior of suspended sediments in a small river draining out of the Himalaya, Tawi River, northern India: Implications on provenance and weathering
(2012) M. Verma; B.P. Singh; A. Srivastava; Meenal Mishra
Mud forms a major portion of the river suspended sediments. Its chemical behavior is significant in determining nature of source rocks, mineral weathering phase and weathering environments. Here, we present the chemical behavior of the sub-sand size (<0.062 mm size) fraction of the suspended sediments of a small river that carries sediments from the Himalaya. The SiO 2and Al 2O 3are inversely proportional with each other and they show decreasing and increasing downstream trends, respectively. The concentration of TiO 2is almost constant in the entire course of the river and the concentrations of Fe 2O 3, CaO and MgO increase downstream. The increase of CaO concentration is coupled with increase of MgO concentration and vice-versa. The MgO and Sr show a strong negative correlation with SiO 2(r 2=-95.5 and -81.2, respectively). The Th/Sc and Zr/Sc ratios reflect a change from the felsic-dominated metamorphic and igneous rocks of the upper reaches to the sedimentary terrain of the lower reaches. This may be because of a change in the provenance where sedimentary rocks of the lower reaches show more contribution from a mafic rock during their sedimentation. Because of the major contributions from the felsic continental crust, the rare earth elements (REEs) show a negative Eu anomaly. This is also reflected by the light rare earth elements (LREEs) enrichment as compared to the upper continental crust (UCC). An average La/ Lu (N) ratio of 22.4 is possible as a result of HREEs depletion and LREEs enrichment similar to other rivers of the world. The abundance of SiO 2in the samples may be because of a relative abundance of quartz in the silt-sized fraction in the mud, and an inverse correlation between the SiO 2and the Al 2O 3may be because of relative abundance of silt and clay fractions. A positive correlation of the Mg and Sr with Ca, and their weak positive correlation with Al 2O 3and a negative correlation with SiO 2imply that they are chiefly related to carbonate weathering. The weathering regime is a result of the subtropical climatic conditions and monsoonal climate prevailing in the catchments of the Tawi River similar to other Himalayan rivers.
Chert breccia
(2011) B.P. Singh
[No abstract available]
Corrigendum to “Cardiological Society of India position statement on management of heart failure in India” (Indian Heart Journal (2018) 70(S1) (S1–S72), (S0019483218303006) (10.1016/j.ihj.2018.05.003))
(Elsevier B.V., 2018) Santanu Guha; S. Harikrishnan; Saumitra Ray; Rishi Sethi; S. Ramakrishnan; Suvro Banerjee; V.K. Bahl; K.C. Goswami; Amal Kumar Banerjee; S. Shanmugasundaram; P.G. Kerkar; Sandeep Seth; Rakesh Yadav; Aditya Kapoor; Ajaykumar U. Mahajan; P.P. Mohanan; Sundeep Mishra; P.K. Deb; C. Narasimhan; A.K. Pancholia; Ajay Sinha; Akshyaya Pradhan; R. Alagesan; Ambuj Roy; Amit Vora; Anita Saxena; Arup Dasbiswas; B.C. Srinivas; B.P. Chattopadhyay; B.P. Singh; J. Balachandar; K.R. Balakrishnan; Brian Pinto; C.N. Manjunath; Charan P. Lanjewar; Dharmendra Jain; Dipak Sarma; G. Justin Paul; Geevar A. Zachariah; H.K. Chopra; I.B. Vijayalakshmi; J.A. Tharakan; J.J. Dalal; J.P.S. Sawhney; Jayanta Saha; Johann Christopher; K.K. Talwar; K. Sarat Chandra; K. Venugopal; Kajal Ganguly; M.S. Hiremath; Milind Hot; Mrinal Kanti Das; Neil Bardolui; Niteen V. Deshpande; O.P. Yadava; Prashant Bhardwaj; Pravesh Vishwakarma; Rajeeve Kumar Rajput; Rakesh Gupta; S. Somasundaram; S.N. Routray; S.S. Iyengar; G. Sanjay; Satyendra Tewari; G. Sengottuvelu; Soumitra Kumar; Soura Mookerjee; Tiny Nair; Trinath Mishra; U.C. Samal; U. Kaul; V.K. Chopra; V.S. Narain; Vimal Raj; Yash Lokhandwala
In the article titled ‘Cardiological Society of India Position Statement on Management of Heart Failure in India’ below is the list of corrections to be included. The authors would like to apologise for any inconvenience caused. Fig. 14 ECG of a patient with RVEMF and atrial fibrillation, qR in V1 and R/S ratio in lead V2 more than V1. Fig. 15 ECG of a patient with LVEMF showing LVH with strain pattern. Fig. 16. Fluoroscopy showing the presence of LV apical calcium. Fig. 17. LV angiogram in a patient with LVEMF showing the obliteration of the LV apex, transverse diameter more than the longitudinal diameter and no MR (primary diastolic HF). Fig. 18. RV angiogram in a patient with RVEMF showing obliteration of the RV apex and body, RVOF dilatation and significant TR. Fig. 19. Echocardiogram, apical 4-chamber view, showing the presence of calcium at the LV apex. Fig. 20. Perfusion MRI, 4-chamber view in diastole showing fibrosis and obliteration of RV apex (white arrow) [RV – right ventricle, RA – Right atrium, LA – left atrium]. In the text – Page S 48 Column 2 Section 3.10.3 Figs. 13 and 14 – Corrected as Figs. 14 and 15. Figs. 16–18 – Corrected as Figs. 16–19. Fig 19 – Corrected as Fig 20 References: The references are changed as given below (Page S 66). 240. K Balakrishnan, Ratnagiri R, S. Rao, M. Tungaturu Limiting the Number of Endomyocardial Biopsies does not impact one year survival after Heart Transplant. J heart Lung Transplant. Supplement. April 2016 Volume 35; Issue 4, Supplement: S210. 241. Stehlik J, Starling RC, Movsesian MA, et al. Utility of long-term surveillance endomyocardial biopsy: a multi-institutional analysis. J Heart Lung Transplant. 2006; 25:1402–1409. To be added at the end of references (Can be given as reference in the heading 2.8). Status of Cardiac Transplantation in India.(583) 583. Dr KR Balakrishnan, R Ravi Kumar; - “Status of Cardiac Transplantation in India” Pages 599–606 in Chapter 44 of CSI TEXT BOOK OF CARDIOLOGY. (Ed) PK Deb 2018 Jaypee Brothers, New Delhi. © 2018 Cardiological Society of India
Corrosion behaviour of an indigenous Ag-Sn-Cu cast dental alloy in artificial saliva
(Blackwell Publishing Ltd, 1998) T.K. Patro; B.P. Singh; V. Singh
The corrosion behaviour of an indigenous cast alloy of Ag-Sn-Cu, developed for crown and bridge prostheses, was studied in artificial saliva, with and without the addition of 0.1 M lactic acid, using a potentiostatic technique, and compared with that of the standard cast alloy of Ag-Pd (Ney 76). The values of different parameters such as corrosion potential and corrosion current density were determined for the indigenous alloy of Ag-Sn-Cu and the Ag-Pd alloy. The rate of corrosion of the indigenous alloy was found to be relatively higher than that of the Ag-Pd alloy up to an applied potential of + 400 mV. However, while the indigenous alloy showed a distinct tendency for passivation below + 200 mV at the current level of 0.5 mA/cm2 in the artificial saliva (pH 5.7) at 37°C, no such tendency for passivation was shown by the Ag-Pd alloy even up to + 400 mV. The tendency for passivation by the indigenous Ag-Sn-Cu alloy, however, was not shown in the artificial saliva in the presence of 0.1 M lactic acid (pH. 2.7) at 37°C. Minor variation was observed in the corrosion behaviour of the indigenous Ag-Sn-Cu alloys of different grades prepared by alloying elements of varying purity. © 1998 Blackwell Science Ltd.
CSI position statement on management of heart failure in India
(Elsevier B.V., 2018) Santanu Guha; S. Harikrishnan; Saumitra Ray; Rishi Sethi; S. Ramakrishnan; Suvro Banerjee; V.K. Bahl; K.C. Goswami; Amal Kumar Banerjee; S. Shanmugasundaram; P.G. Kerkar; Sandeep Seth; Rakesh Yadav; Aditya Kapoor; Ajaykumar U. Mahajan; P.P. Mohanan; Sundeep Mishra; P.K. Deb; C. Narasimhan; A.K. Pancholia; Ajay Sinha; Akshyaya Pradhan; R. Alagesan; Ambuj Roy; Amit Vora; Anita Saxena; Arup Dasbiswas; B.C. Srinivas; B.P. Chattopadhyay; B.P. Singh; J. Balachandar; K.R. Balakrishnan; Brian Pinto; C.N. Manjunath; Charan P. Lanjewar; Dharmendra Jain; Dipak Sarma; G. Justin Paul; Geevar A. Zachariah; H.K. Chopra; I.B. Vijayalakshmi; J.A. Tharakan; J.J. Dalal; J.P.S. Sawhney; Jayanta Saha; Johann Christopher; K.K. Talwar; K. Sarat Chandra; K. Venugopal; Kajal Ganguly; M.S. Hiremath; Milind Hot; Mrinal Kanti Das; Neil Bardolui; Niteen V. Deshpande; O.P. Yadava; Prashant Bhardwaj; Pravesh Vishwakarma; Rajeeve Kumar Rajput; Rakesh Gupta; S. Somasundaram; S.N. Routray; S.S. Iyengar; G. Sanjay; Satyendra Tewari; G. Sengottuvelu; Soumitra Kumar; Soura Mookerjee; Tiny Nair; Trinath Mishra; U.C. Samal; U. Kaul; V.K. Chopra; V.S. Narain; Vimal Raj; Yash Lokhandwala
[No abstract available]
Depositional environments and sources for the middle Eocene Fulra Limestone Formation, Kachchh Basin, western India: Evidences from facies analysis, mineralogy, and geochemistry
(John Wiley and Sons Ltd, 2019) V.K. Srivastava; B.P. Singh
The middle Eocene Fulra Limestone Formation of the Kachchh Basin, western India was investigated to interpret depositional environments and sources of limestones based on facies analysis, mineralogy, and major, trace, and rare earth elements (REEs) geochemistry. Facies stacking pattern of the Fulra Limestone Formation exhibits an overall shallowing-upward sedimentary succession developed in the middle to inner ramp to lagoonal set-up. Staining of the thin sections and X-ray diffraction patterns show dominance of calcite mineral. The CaO, ranging from 40.45% to 49.69%, is the dominant oxide among the major oxides followed by SiO 2 (4.04–10.3%). The dominance of CaO over MgO suggests that the major mineral phase has been calcite and no dolomitization occurred during the deposition of the Fulra limestone. The low proportion of SiO 2 and Al 2 O 3 suggests low siliciclastic input during the precipitation of the Fulra limestone that is confirmed by the positive correlation of ∑REE with Al 2 O 3 , Fe 2 O 3 , Ni, Th, Sc, and Y and the negative correlation of SiO 2 , Al 2 O 3 , and Sr with CaO. The average value of REE contents in the Fulra Limestone Formation are lower (*16.02 ppm) than the average value of typical marine carbonates (*28 ppm). The Post-Archean Australian Shale-normalized REE + Y patterns of the Fulra limestone exhibit seawater like shale-normalized REE + Y pattern, whereas slightly lower average value of Y/Ho ratio (34.60) than the typical seawater value (~44–74) suggests modification of the seawater, to some extent, by input of freshwater in a coastal environment. The REEs of the Fulra Limestone Formation have similarity with the carbonates of the Arabian Sea and/or shallow marine carbonates with exception of a few elements. It is envisaged from this study that the Fulra limestone was deposited in a shallow marine to coastal set-up where mixing of the continental material in seawater was feasible. Copyright © 2018 John Wiley & Sons, Ltd.
Depositional environments of the Surma Group of Tamenglong area, North-western Manipur, Indo-Myanmar Ranges: Mineralogical and palynological constraints
(Wadia Institute of Himalayan Geology, 2019) Ksh Atamajit Singh; Y. Raghumani Singh; S. Ranjeeta Devi; B.P. Singh; V.K. Srivastava
This paper highlights the depositional environments of the Surma Group of the northwestern Manipur in the Indo-Myanmar Ranges. These sequences represent the molásse sedimentary succession of the Indo-Myanmar Ranges (IMR) and their depositional environments have been assessed by means of field observations and reinforced with palynology supported with mineralogy. Thinly bedded silty shale and laminated shale with planar beddings suggest that the sedimentation took place in a quiet-water environment. A tropical-subtropical climate linked with humid phase and heavy rainfall is inferred from fungal remains (fruiting bodies, spores and hyphae), pteridophyte spores and angiosperm pollen. The palynotaxa Hammenisporis spp., Proxaperties sp., Polypodiisporites and Polypodiaceasporites sp. suggest the depositional environment of Surma Group to be a fresh water swamp. The occurrence of kaolinite in some samples again suggests the humid climate of low latitude. Thus, the shallow freshwater realm in a well-oxygenated condition deposited the sedimentary sequences of the Surma Group. © 2019, Wadia Institute of Himalayan Geology. All rights reserved.
Development of silver-base alloy for crown and bridge prostheses
(Kluwer Academic Publishers, 1995) T.K. Patro; S. Homagain; B.P. Singh; V. Singh
Three silver-base alloys containing varying amounts of tin and copper were prepared by induction melting and centrifugal casting, and their properties were evaluated and compared with those of the type III gold alloy, for their suitability for non-porcelain crown and bridge work in dentistry. Among these the alloy II (Ag-Sn-Cu-Zn) was found to possess the best combination of strength and ductility and highest corrosion resistance in artificial saliva. Also its wear resistance was found superior to alloys I and III and was comparable to that of natural tooth. Thus the alloy II was found to be quite a promising indigenous and economic silver-based cast alloy for crown and bridge prostheses. © 1995 Chapman & Hall.
Effect of anodization on corrosion behaviour and biocompatibility of Cp-titanium in simulated body fluid
(2013) Archana Singh; B.P. Singh; Mohan R. Wani; Dinesh Kumar; J.K. Singh; Vakil Singh
The objective of this investigation is to study the effectiveness of anodized surface of commercial purity titanium (Cp-Ti) on its corrosion behaviour in simulated body fluid (SBF) and proliferation of osteoblast cells on it, to assess its potentiality as a process of surface modification in enhancing corrosion resistance and osseointegration of dental implants. Highly ordered nano-porous oxide layer, with nano-sized pores, is developed on the surface of Cp- Ti through electrochemical anodization in the electrolyte of aqueous solution of 0.5% HF at 15 V for 30 min at 24 °C. The nano-porous feature of the anodized surface is characterized by field-emission scanning electron microscope (FESEM). Pores of some anodized samples are sealed by exposing the anodized surface in boiling water. Corrosion behaviour of the anodized specimen is studied in Ringer's solution at 30 ± 2 °C, using electrochemical impedance and cyclic polarization technique. Biocompatibility of the anodized surface is accessed using MG63 osteoblast cells. Both corrosion as well as pitting resistance of Cp-Ti in simulated body fluid are found to be highest in the anodized and sealed condition and followed in decreasing order by those of anodized and unanodized ones. Significantly higher MG63 osteoblast cell proliferations are found on the anodized surface than that on the unanodized one. Anodized Cp-Ti develops nano-size surface pores, like that of natural bone. It enhances corrosion and pitting resistance and also the process of osteoblast cell proliferation on Cp-Ti. © Indian Academy of Sciences.
Effect of pre-sowing exposure of seeds to gamma-radiation on the drought resistance behaviour of barley plants (Hordeum vulgare L.)
(Martinus Nijhoff, The Hague/Kluwer Academic Publishers, 1972) O.K. Garg; B.C. Misra; B.P. Singh
With a view to examine the effect of pre-sowing exposure of seeds to gamma radiation (3000 r) on the drought resistance behaviour of barley plants (Hordeum vulgare L., Var. K12), a pot-culture experiment was conducted at a glasshouse attached to the Department of Plant Physiology. The plants were subjected to wilting treatments at tillering stage and were maintained so for ten days. Subsequently, observations on survival capacity, growth behaviour and physiological changes were made during the wilting period. The data obtained were subjected to statistical analysis. Reduction in soil moisture causes a set-back in the physiological status of barley plants and thereby inhibits the crop growth. Presowing exposure of seeds to gamma-radiation induced drought tolerance in barley plants. It not only improved the growth behaviour but also maintained an active metabolism in plants even under wilting condition. Although the investigation is of preliminary nature, but it certainly offers newer scope of research towards useful utilization of gamma radiation in relation to drought tolerance in crops. © 1972 Martinus Nijhoff.
Effects of foliar application of boron on mango
(1976) C.B.S. Rajput; B.P. Singh; H.P. Mishra
Foliar application of boric acid, at varying concentrations, to mango cultivar 'Langra' significantly influenced the growth, flowering, fruiting and fruit quality. Highest values for most of the characteristics were obtained in the treatment where 0.8% boric acid was used. © 1976.