VERTICAL VARIATION IN PHYSICO-CHEMICAL AND MECHANICAL PROPERTIES OF Toona ciliata M. Roem.

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dc.contributor.advisorBHUPENDER DUTT
dc.contributor.authorCHAMBYAL, SHIVANI
dc.date.accessioned2020-10-30T05:37:59Z
dc.date.available2020-10-30T05:37:59Z
dc.date.issued2020-10
dc.description.abstractABSTRACT The present research entitled “Vertical variation in physico-chemical and mechanical mechanicalof Toona ciliata M. Roem.” was carried out in the Laboratory and Wood Workshop in the Department of Forest Products, College of Forestry, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during 2018-19 and 2019-20. Toona ciliata tree of age about thirty-fiveyear was felled and converted into seven logs (base 0%, 15%, 30%, 45%, 60%, 75% and 90%) of total bole height to investigate the physical, chemical and strength properties of the wood. It showed significant variation along the bole height. The values of diameter, bark percentage ranged between 24.90 cm (90%) to 52.00 cm (base) and 5.21 per cent (90%) to 7.72 per cent (base), respectively. The maximum moisture content (143.61%) was maximum at 90 per cent and minimum (103.96%) at base. Maximum specific gravity (0.591) was recorded from base and minimum (0.481) was recorded from 90 per cent. The values for fibre length and fibre diameter ranged between 0.96 mm (90%) to 1.09 mm (base) and 0.020 mm (90%) to 0.026 mm (base), respectively. The cold water-soluble extractives, hot water-soluble extractives, alcohol-benzene soluble extractives, holocellulose content, lignin content and ash content ranged between 4.73 per cent (90%) to 6.05 per cent (base), 7.33 per cent (90%) to 8.15 per cent (base), 7.19 per cent (90%) to 8.93 per cent (base), 69.33 per cent (base) to 71.37 per cent (90%), 22.18 per cent (90%) to 24.07 per cent (base) and 1.72 per cent (base) to 2.70 per cent (90%) of total bole height, respectively. The tensile strength, bending strength, compressive strength parallel to grain, compression strength perpendicular to grain, bending modulus of rupture, modulus elasticity in tensile strength, modulus of elasticity in bending strength, modulus of elasticity compression parallel to grain, modulus of elasticity compression perpendicular to grain were ranged between 0.043 kN/mm2 (90%) to 0.077 kN/mm2 (base), 0.009 kN/mm2 (90%) to 0.012 kN/mm2 (base), 0.049 kN/mm2 (90%) to 0.054 kN/mm2 (base), 0.015 kN/mm2 (90%) to 0.028 kN/mm2 (45%), 0.211 kN/mm2 (90%) to 0.225 kN/mm2 (base), 0.697 kN/mm2 (90%) to 1.287 kN/mm2 (15%), 7.424 kN/mm2 (90%) to 10.551 kN/mm2 (base), 0.477 kN/mm2 (60%) to 0.784 kN/mm2 (base) and 0.045 kN/mm2 (15%) to 0.088 kN/mm2 (30%), respectively.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810153985
dc.keywordsVertical variation,physico-chemical , mechanical mechanical,Toona ciliata M. Roemen_US
dc.language.isoEnglishen_US
dc.pages67+iven_US
dc.publisherNAUNI,UHFen_US
dc.subForest Productsen_US
dc.themeVertical variation,physico-chemical , mechanical mechanical,Toona ciliata M. Roemen_US
dc.these.typeM.Scen_US
dc.titleVERTICAL VARIATION IN PHYSICO-CHEMICAL AND MECHANICAL PROPERTIES OF Toona ciliata M. Roem.en_US
dc.typeThesisen_US
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