000			01303nam a2200205Ia 4500
008			220216s9999 xx 000 0 und d
100			_aJoseph K
245		0	_aEffect of Azotobacter inoculation on rubber seedlings
260			_bIndian Journal of Natural Rubber Research _c1997
300			_a34-38
520			_aFive isolates of Azotobacter collected from different regions of Kerala were studied for their survival in rubber (Hevea brasiliensis) plantation soil and for their nitrogen fixing capacity at different pH levels. Only two survived in soil at pH 4.8. One isolate showed more nitrogenase activity from pH 4.5 to 6 and was studied for its effects on growth of rubber seedlings when used in combination with different levels of the recommended dose of urea. The girth of seedlings which received 50 per cent of recommended dose of nitrogen with azotobacter inoculation was comparable to plants which received 100 per cent of the recommended dose alone. Azotobacter inoculation augmented the population of various microorganisms in the rhizosphere of rubber seedlings.
650			_aAzotobacter
650			_aHevea
650			_aMicrobial population
650			_aNitrogenase activity
700			_aKothandaraman R
700			_aMathew J
700			_aVimalakumari T G
942			_cJS
999			_c57698 _d57698