SHARMA, KULWANT RAIYADAVRAO, SUMTHANE YOGESH2018-05-192018-05-192018-04http://krishikosh.egranth.ac.in/handle/1/5810046745Abstract The present research entitled on “Studies on wood properties of toon wood (Toona ciliata M. Roem.) procured from local markets in Himachal Pradesh” 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 2014-17. The study revealed significant variation between physical, anatomical, chemical and mechanical characteristics of toon wood from different market location of Himachal Pradesh. The samples of the toon wood were noticed with fine texture and wood colour was noticed as moderate reddish brown 166 [B] and moderate orange 166 [D] in most of the samples. The maximum specific gravity was noticed in Soutta (0.534) and minimum in Badibhu (0.487). The moisture content of toon wood ranged from 21.00 to 27.09 per cent. In case of anatomical parameters, the longest fibre length was recorded in Shahpur (1.047 mm) and the shortest in Shambhuwala (0.862 mm) with fibre width ranged from 0.019 to 0.020 mm. The maximum vessel diameter observed in Kheri (0.165 mm) and minimum in Sarahan (0.135 mm). The vessel frequency ranged from 4.317 mm2 to 6.792 /mm2. The longest ray length was recorded in Shambhuwala (0.417mm) whereas, the shortest in Rajgarh (0.264 mm) while, the ray width was found to be widest in Shambhuwala (0.085 mm) and narrowest in Rajgarh (0.063 mm). The ray frequency ranged from 9.587 mm2 to 13.328 mm2. Among the different chemical parameters, the percentage of cold water, hot water, alcohol benzene and NaOH soluble extractives were found to be highest in Sarahan (5.09 %), Bhalja (8.65 %), Bhalja (8.90 %) and Kandaror (8.95 %) respectively. The maximum percentage of holocellulose and lignin content were recorded in Bhalja (72.34 %) and Kheri (24.65 %), respectively. Among different mechanical properties, the maximum tensile and bending strength was recorded in Galore (0.120 kN/mm2) and Shambhuwala (0.014 kN/mm2. The maximum compressive strength parallel and perpendicular to grain was noticed in Tectona grandis (0.067kN/mm2) and Kheri (0.058 kN/mm2), respectively. The highest modulus of elasticity parallel to grain was observed in Soutta (1.282 kN/mm2). The maximum tensile and bending modulus of elasticity was observed in Sarahan (2.543 kN/mm2) and Kandaror (37.597 kN/mm2), respectively. The bending modulus of rupture was observed to be maximum in Shambhuwala (0.268 kN/mm2) and minimum in Kheri (0.227 kN/mm2). The maximum elongation with tension and bending was found in Shambhuwala (6.79 %) and Soutta (3.72 %), respectively. Highly significant positive correlations were found between fibre length and ray frequency (0.418) and vessel diameter (0.463) at 1 per cent level of significance. The specific gravity was found to be positively significant with holocellulose (0.374) at 1 percent level of significance and with Alcohol benzene soluble extractives (0.348) at 5 per cent level of significance. In case of simple correlation in mechanical properties, the highest positive correlation was noticed between Bending strength and Modulus of rupture in bending (0.963).ennullThesis