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Shukla, N. K.
- Comparative Development of Multiple Seedlings in Different Seed Sources of Azadirachta indica A. Juss
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Indian Forester, Vol 127, No 6 (2001), Pagination: 645-649Abstract
The occurrence of multiple seedlings were observed in Neem (Azadirachta indica) during the germination studies in different Seed Sources of seeds. In the case of Neem the emergence of multiple seedlings is not due to polyembryony but due to sowing of seeds along with the endocarp of fruit not kernel. Each endocarp encloses 1-4 seeds in it. However, in the present study it differs in different Seed Sources.
- Physical and Mechanical Properties of Different Clones of Populus deltoides - an Assessment
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Indian Forester, Vol 126, No 1 (2000), Pagination: 31-56Abstract
The physical and mechanical properties based on testing of timber of 20 different clones of Populus deltoides obtained from trial plantation have been reported. From the basic data safe working stresses and suitability indices for different properties have also been evaluated and presented. The results indicate considerable variation in the properties of different clones. Clone S7-C3 has been found to have the highest sp. gravity and most ofits strength properties are also higher as compared to other clones. Several clones meet the minimum requirement of strength not only for use as structural timber but also for door shutters, furniture items and packing cases/crates. As the material of different clones was tested from trial plantations it is suggested that more exhaustive testing of the material from other localities will help in drawing firm conclusions.- Status of Research on Variation of Strength of Timber in India
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Indian Forester, Vol 118, No 9 (1992), Pagination: 630-637Abstract
Briefly bringing out the importance of research on variation of strength of timber, the results of studies undertaken on between and within species variation of properties of Indian timbers have been briefly presented and discussed. It has been emphasised that while knowledge of between species variation is necessary for rational classification and utilisation of different timbers for various end uses, the knowledge of within species variation is important for proper grading and selection of material.- Physical and Mechanical Properties of Some Exotic Species
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Indian Forester, Vol 116, No 2 (1990), Pagination: 140-147Abstract
Based on the tests conducted on small clear specimens of Acacia benthamii, Casuarina cunninghamiana, Eriobotrya joponica. Milingtonia hortensis, Prosopis juliflora and Thuja orientalis from some localities, their physical and mechanical properties have been reported and discussed. The safe working stresses for structural purposes and suitability indices for various Industrial and engineering uses have also been reported. While the avilable data on all the species is not sufficient for drawing firm conclusions about their utilisation for different end uses, it has been found that Millingtonia hortemis and Prosopis juliflora are more suitable from strength point of view, for constructional purposes, tool handles and railway sleepers. Prosopis juliflora has also been found suitable for dunnage pallets.- Physical and Mechanical Properties of Plantation - Grown Acacia leucophloea, A. Nilotica and A. Tortilis from Mohindergarh (Haryana)
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Indian Forester, Vol 116, No 10 (1990), Pagination: 803-811Abstract
Based on the tests conducted on small clear specimens of plantation grown Acacia leucophloea. A. nilolica and A. tortilis from Mohindergarh (Haryona), their physical and mechanical properties have been reported and discussed. Although all the three species are heavier than Teak, they are not superior to Teak in several mechanical properties. Based on suitability indices, these species have been grouped as very heavy and moderately steady timbers. From strength point of view, all the three species are suitable for constructional purposes, railway sleepers, tool bandies, fence posts, agricultural implements, anvil blocks, mallet heads etc. A. nilotica and A. tortilis are also suitable for the manufaCture of dunnage pallets.- A Note on the Physical and Mechanical Properties of Robinia pseud-acacia, Fraxinus Spp. And Ailanthus Spp. from Srinagar (J & K)
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Indian Forester, Vol 112, No 2 (1986), Pagination: 139-151Abstract
Based on tests carried out on small clear specimens, the physical and mechanical properties of Robinia pseud-acacia, Fraxinus spp., and Ailanthus spp., obtained from Srinagar (J & K), are reported, discussed and compared with Robinia pseud-acacia (U.S.A.), Fraxinus excelsior (UK) and Ailanthus Integrifolia (Buxa. W.B.) and also with Tectona grandis. The safe working stresses and comparative suitability indices for various industrial and engineering uses have also been evaluated and reported. It is observed that although Robinia pseud-acacia and Fraxinus spp. From Srinagar (J & K) are slightly heavier than their U.S.A., and U.K., counterparts in strength properties the former are not consistently superior. Based on the strength propeties, the end-uses of Robinia pseud-acacia and fraxinus spp. are also suggested.- Preliminary Studies on Strength Properties of some Exotic Timbers
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Indian Forester, Vol 112, No 5 (1986), Pagination: 459-465Abstract
The physical and mechanical properties of ten exotic timber species, tested from some localilies of the country, have been reported. From the general analysis of the data, it would appear that most of the exotic species under discussion are weak in strength properties as compared to the average Indian species, Tectona grandis (teak) it is suggested that all exotic timbers, which are being grown in the country, should be subjected to exhaustive testing and evaluation for drawing firm conclusions about their rational utiliation for industrial applications.- Physical and Mechanical Properties of Quercus griffithii from Khasi Hills Division (Meghalaya)
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Indian Forester, Vol 109, No 4 (1983), Pagination: 237-245Abstract
no abstract- Physical and Mechanical Properties of Fraxinus Spp. (Ash) from Some Localities
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Indian Forester, Vol 109, No 8 (1983), Pagination: 553-561Abstract
Based on tbe tests conducted on small clear specimens, the physical and mechanical properties of Fraxinus micrantha (Nainital, U.P.), F. hookeri (Chamba, HP), F. xanthoxyloides (Kulu, HP) and F. spp. (Srinagar, J & K) are reported and discussed. The test results have been compared with foreign ash i.e. F. excelsior (UK) and F. americana (USA as well as Canada). The comparative suitability indices for various end-uses have also been evaluated for Indian and Foreign ash from the basic strength data and reported. From the data of Indian ash collected so far, it is concluded that while the Indian ash is slightly heavier than foreign ash, in strength properties there is no notworthy difference between the two. Some end-uses are also suggested.- Physical and Mechanical Properties of Eucalypts Grown in India
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Indian Forester, Vol 109, No 12 (1983), Pagination: 933-943Abstract
Briefly bringing out the need for detailed evaluation of different species of eucalypts grown in India, data on physical and mechanical properties of 9 species have been presented and discussed. The data of some of the species, tested from more thon one locality, has been presented separately for different localities. Safe working stresses and suitabiliy indices have also been presented wherever available. Utilisation of Eucalyptus bybrid for overhead power and telecommunication lines, ballies, fence posts and tool handles has also been discussed.- A Preliminary Note on Strength Prperties Of Leucaena leucocephala From Lalkua, Tarai Bhabar Forest Division (U.P.)
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Indian Forester, Vol 108, No 3 (1982), Pagination: 226-229Abstract
Based on physical and mechanical tests conducted on small clear specimens, the strength properties of Leueaena leucocephala in green condition, are reported and compared with Fraxinus micrantha, Morus alba and Tectona grandis. In general Leueaena leucocephala has given slightly lower strength properties except in some cases as compared to above species.- A Note on the Specific Gravity of Eucalyptus Species from Different Localities
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Indian Forester, Vol 107, No 7 (1981), Pagination: 438-447Abstract
Eucalypts have been planted extensively in different parts of this country. For quicker evaluation of plantations for their industrial utilisation its specific gravity is often required. In the present paper specific gravity of different species of the Eucalyptus tested from 40 different localities has been reported and discussed.- Preliminary Note on the Physical and Mechanical Properties of Fraxinius uhdei Grown at New forest, Dehra Dun, (U.P.)
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Indian Forester, Vol 106, No 9 (1980), Pagination: 641-644Abstract
FraxinuS uhdei, a fast growing deciduous timber species native of Mexico, was introduced for the first time in 1960 in New Forest, Dehra Dun. With a view to examine the suitability of its timber for various industrial uses, some material from trial plantations was tested for the evaluation of its strength properties. The tests were carried out on 2 x 2 cm cross-section specimens on the material from 14 and 11 years old trees both in 'green' and 'kiln dry' conditions and the results are presented and discussed. The test results have also been compared with Fraxinus hookeri from Chamba (H.P.) and Tectona grandis from Malabar, Nilambur and Coimbatore. The results have indicated that Fraxinus uhdei is weaker in comparison to average Indian species. It has been suggested that Fraxinus uhdei should be tested more exhaustively from plantation trees of different age groups aod localities before suitable conclUsions could be drawn about its utilisation for specific industries uses.- A Note on Physical and Mechanical Properties of Pterocarpus marsupium (Bija Sal) from Samta Range (Bihar)
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