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Mishra, V. K.
- Effects of Collection Date and Tree Diameter Class on the Germination Behaviour of Axle Wood (Anogeissus latifolia Wall.) Seeds
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Indian Forester, Vol 133, No 9 (2007), Pagination: 1173-1178Abstract
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.- Macropropagation of Ban Oak - Quercus leucotrichophora Camus, Through Stem Cuttings
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Indian Forester, Vol 129, No 9 (2003), Pagination: 1109-1116Abstract
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.- Air Layering Trials in Azadirachta indica A. Juss
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Indian Forester, Vol 128, No 1 (2002), Pagination: 70-74Abstract
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.- Factors Affecting Natural Regeneration of Ban Oak (Quercus leucortichophora A. Camus Ex. Bahadur) : I. Seed Fall, Infestation, Losses and Regeneration
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Indian Forester, Vol 119, No 12 (1993), Pagination: 986-993Abstract
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.- Effect of Root Culturing and Fertilizers on Biochemical and Nutrient Parameters of Seedling Roots of Ulmus villosa, Brandis ex Gamble
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