000			01589nam a2200241Ia 4500
008			220216s9999 xx 000 0 und d
100			_aBhat K M
245		0	_aSome wood and bark properties of Hevea brasiliensis
260			_bJournal of Tree Science _c1984
300			_a40-46
520			_aSelected properties, such as wood basic density, bark basic density, thickness and percentage of bark, fibre length and cellular proportion of 28 to 30 year old Hevea brasiliensis(HBK) Muell. Arg. (rubber wood) have been studied. The wood is light to moderately heavy and lighter than bark. The fibre length is higher than average for fast growing hardwood species. Except in the thickness and percentage of bark, no statistically significant differences exit between the three height levels (0.5 m above the ground, 50;and 75;of tree heights) in basic density, fibre length and cell type percentages. The basic density and fibre length show an increasing trend from the pith outwards (with an increase in age), although they remain constant or decrease near the bark region. The radial patterns of variation in basic density and fibre length (in parabolic curves) suggest the occurrence of jevenile core of about 9 cm radius, which is important in determining the quality of sawnwood.
650			_aBark properties
650			_aBasic density
650			_afibre length
650			_aHevea brasiliensis
650			_aJuvenile wood
650			_aRubberwood
650			_aTissue proportion
700			_aBhat K V
700			_aDhamodaran T K
700			_aRugmini P
942			_cBO
999			_c48078 _d48078