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D. R. Bhardwaj , Nitin Verma , V. K. Mishra , N. R. Bhardwaj

Abstract

Axle wood (Anogeissus latifolia Wall.), a principal forest tree species of the sub-tropical and tropical forest ecosystems was used to study the effect of collection dates and diameter classes on per cent viability, insect pest infestation and germination attributes of its seeds. Diameter classes only influenced the viability status and insect-pest infestation significantly. In the diameter classes, maximum viability (33.67%), per cent germination (1.73%), germination energy (1.20) and germination value (0.158), and minimum insect-pest infestation (5.87%) was recorded in 21-30 cm diameter. The collection dates significantly influenced all the studied traits, excepting germination value. Maximum per cent germination (2.00%), germination energy (1.33%) and germination value (0.145%), irrespective of tree-diameter class was recorded in seeds collected in the 2nd half of March. Therefore, from the present investigation it can be concluded that under Himachal Pradesh conditions, seeds should be collected during the 2nd half of March, from 21-30 cm diameter class for realizing maximum germination potential.

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V. K. Mishra , D. R. Bhardwaj , G. S. Shamet

Abstract

Ban Oak (Quercus leucotrichohora Camus), a principal forest tree species of North-West Himalayan forest eco-system, was used to investigate the effect of chemical treatment, season, donor plant and shoot position on ischolar_maining and primary ischolar_main number, and subsequent survival of the ischolar_mained cuttings. The per cent ischolar_maining and primary ischolar_main number improved markedly upon application of chemical treatment. maximum per cent ischolar_maining (35.25) was recorded in the rainy season planted seedling cuttings treated with chemical formulation of 0.8% IBA + 0.2% p-HBA + 5% sucrose + 5% captan. Irrespective of chemical treatment, season and position, seedling cuttings demonstrated significantly better per cent ischolar_maining and primary ischolar_main number than tree cuttings. Primary ischolar_main number were more in lower portion of the shoot cuttings, while per cent ischolar_maining was higher in cuttings collected from the upper portion of the shoot. The seedling cuttings collected from upper portion of the shoot during rainy season displayed better survival than others. From the present study, it can be concluded that for achieving maximum ischolar_maining and survival of the ischolar_mained propagules, the cuttings should be collected during rainy season from the upper portion of the seedling shoot and treated with chemical formulation of 0.8% IBA + 0.2% p-HBA + 5% Sucrose + 5% Captan.

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V. K. Mishra , S. P. Chaukiyal , Mohinder Pal

Abstract

Air layering trials were conducted in Neem (Azadirachta indica A. Juss) during the months of February, May and August in areas of Uttaranchal and Punjab. One year old lateral branches were girdled, and IBA 500-1000 ppm was applied at the exposed surfaces and wrapped with moistened sphagnum moss. Callus was formed at the girdled portions of all the air layers, with/or without IBA treatments. Adventitious ischolar_maining was obtained in the air layers of February and May while the layers made during August failed to form ischolar_mains. Even the slight delay in air layering trials during monsoon period may suppress air layering response in Neem. The results of our study suggests that early summer season (May) seems to be best period for air layering in Neem and ischolar_maining was obtained within two months following girdling.

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K. N. Qaisar , V. K. Mishra , N. K. Joshi

Abstract

The seedfall observed from Dec.10,1989 to Feb.18,1990 followed, in general, an unimodal pattern assuming maxima on January 9. The sound and infested seeds showed more or less similar pattern with the progress of sampling date. The total seedfall was estimated to be 11.51 seeds/m² in site-I and 14.76 seeds/m² in site-II. The average contribution of sound and infested seed to total seedfall was computed to be 34.98 and 65.02 per cent in site-I and 29.01 and 70.99 per cent in site-II respectively. Seed infestation on forest floor as well as tree crown exceeded 50 per cent; the latter was on average relatively lower by 13.18 per cent in site-I and 10.06 per cent in site-II. The per cent seed loss from Feb. to July, 1990 was estimated to be around 73 per cent. The maximum germination took place between July to November. The total number of newly germinated seedlings after one year of seedfall was 0.63/m² in site-I and 0.36/m² in site-II.

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Sanjeev K. Chauhan , V. K. Mishra , G. K. Sharma

Abstract

Conditioning treatments viz. undercutting and wrenching significantly influenced all the studied ischolar_main biochemical parameters (proline content, peroxidase activity, total sugars, starch and carbohydrates). Values exhibited an increasing trend with decrease in undercutting depth and increase in wrenching frequency. Application of ammonium nitrate and single super phosphate as nitrogen and phosphorus sources of fertilization, respectively failed to show much effect on these parameters. The increase in stress imposed by undercutting depth × wrenching frequency interaction also manifested effect on these physiological parameters. In general, the nutrients N, P, K, Ca, and Mg content in ischolar_mains increased with increase in stress level. The fertilizer application following undercutting and wrenching treatments also influenced the ischolar_main nutrient concentration significantly.

Keywords

Ulmus Villosa, Undercutting, Wrenching, Fertilizers, Biochemical, Nutrients

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T. S. Mishra ¹, H. M. Singh ², N. K. Mishra ¹, V. K. Mishra ¹, N. D. Singh ¹

Affiliations
1 Krishi Vigyan Kendra, West Kaameng (Arunachal Pradesh), IN
2 National Horticultural Research and Development Foundation, Patna (Bihar), IN

Abstract

The study was carried out during 2014 to 2017 at farmers field of dirang,West Kameng district of Arunacahal Pradesh. The front line demonstration on pea crop of seed was conducted on an area 18 ha for each variety with active participation of 40 farmers with improved technologies of VRP- 22, Arkel and Azad P1. The results revealed that maximum yield 23.0q/ha with an increase over variety Arkel and Azad P1. Improved technology of pea recorded progressively increased average yield 20q/ ha during Three years of study, and minimum to maximum yield found17.0q/ha to 23.0 q/ha. The extension gap can be bridged by popularizing package of practices of pea including improved variety (VRP-22), use of optimum seed rate, balanced nutrition and recommended plant protection measures. Improved technologies gave higher net return of Rs. 40,000/ha with benefit cost ratio 2.43 as compared to Azad P1 (Rs.29,800/- benefit cost ratio 2.06) and Arkel (Rs.1.94/-benefit cost ratio1.94).

Keywords

Pea, Yield, Improved Technology, Benefit Cost Ratio.

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K. K. Yadav ¹, N. Chouhan ², R. Thubstan ², S. Norlha ², J. Hariharan ², C. Borwankar ², P. Chandra ², V. K. Dhar ¹, N. Mankuzhyil ², S. Godambe ², M. Sharma ², K. Venugopal ², K. K. Singh ¹, N. Bhatt ², S. Bhattacharyya ¹, K. Chanchalani ², M. P. Das ², B. Ghosal ², S. Godiyal ², M. Khurana ², S. V. Kotwal ², M. K. Koul ², N. Kumar ², C. P. Kushwaha ², K. Nand ², A. Pathania ², S. Sahayanathan ¹, D. Sarkar ², A. Tolamati ², R. Koul ³, R. C. Rannot ⁴, A. K. Tickoo ⁵, V. R. Chitnis ⁶, A. Behere ⁷, S. Padmini ⁷, A. Manna ⁷, S. Joy ⁷, P. M. Nair ⁷, K. P. Jha ⁷, S. Moitra ⁷, S. Neema ⁷, S. Srivastava ⁷, M. Punna ⁷, S. Mohanan ⁷, S. S. Sikder ⁷, A. Jain ⁷, S. Banerjee ⁷, Krati ⁷, J. Deshpande ⁷, V. Sanadhya ⁸, G. Andrew ⁸, M. B. Patil ⁸, V. K. Goyal ⁸, N. Gupta ⁸, H. Balakrishna ⁸, A. Agrawal ⁸, S. P. Srivastava ⁹, K. N. Karn ⁹, P. I. Hadgali ⁹, S. Bhatt ⁹, V. K. Mishra ⁹, P. K. Biswas ⁹, R. K Gupta ⁹, A. Kumar ⁹, S. G. Thul ⁹, R. Kalmady ¹⁰, D. D. Sonvane ¹⁰, V. Kumar ¹⁰, U. K. Gaur ¹⁰, J. Chattopadhyay ¹¹, S. K. Gupta ¹¹, A. R. Kiran ¹¹, Y. Parulekar ¹¹, M. K. Agrawal ¹¹, R. M. Parmar ¹¹, G. R. Reddy ¹², Y. S. Mayya ¹³, C. K. Pithawa ¹⁴

Affiliations
1 Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai 400 085, India; Homi Bhabha National Institute, Mumbai 400 085, India, IN
2 Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
3 Formerly at Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
4 Raja Ramanna Fellow at Astrophysical Sciences Division, Mumbai 400 085, India, IN
5 Deceased, IN
6 Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai 400 005, India, IN
7 Electronics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
8 Control and Instrumentation Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
9 Center for Design and Manufacture, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
10 Computer Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
11 Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
12 Formerly at Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
13 Formerly at Reactor Control Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN
14 Formerly at Electronics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India, IN

Abstract

The MACE telescope has recently been commissioned at Hanle, Ladakh, India. It had its first light in April 2021 with a successful detection of very high energy gamma-ray photons from the standard candle Crab Nebula. Equipped with a large light collector of 21 m diameter and situated at an altitude of ~4.3 km amsl, the MACE telescope is expected to explore the mysteries of the non-thermal Universe in the energy range above 20 GeV with very high sensitivity. It can also play an important role in carrying out multi-messenger astronomy in India.

Keywords

Gamma-ray astronomy, high energy radiative processes, non-thermal Universe, telescope.

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