000			01638nam a2200301Ia 4500
008			220216s9999 xx 000 0 und d
100			_aMondal G C
245		0	_aPerformance of Hevea clones in Assam
260			_bIndian Journal of Natural Rubber Research _c1999
300			_a55-61
520			_aGrowth and initial yield of ten Hevea clones were studied under the agroclimatic conditions of Assam in North East India. RRIM 600 exhibited the highest girth in juvenile stage closely followed by PB 235 and RRII 118. At the immature stage, PB 235 showed the highest girth after the commencement of tapping during mature stage also, closely followed by PB 86 and RRII 118. Poor growth as well as low rubber yield was observed in all the ten clones during winter months characterised by low temperature from December to March combined with the wintering and refoliation stresses. High DRC of latex, low dry rubber yield and gigh plugging index were observed in all ten clones during May to August. An increasing trend in the yielding pattern was observed from August onwards in all the clones with a maximum in November. RRIM 600 had the highest yield for the first three years of tapping followed by RRII 105 and PB 235 with minimum in GI 1.
650			_aAssam
650			_aClimate
650			_aDRC
650			_aGrowth
650			_aHevea clones
650			_aNorth East India
650			_aPlugging index
650			_aYield
700			_aDeka H K
700			_aGohain T
700			_aGupta C
700			_aKrishna Das
700			_aMondal D
700			_aSingh R P
700			_aThapliyal A P
942			_cJS
999			_c64733 _d64733