http://192.168.1.40:8080/xmlui/handle/123456789/1255 2026-05-31T09:43:15Z 2026-05-31T09:43:15Z Na http://192.168.1.40:8080/xmlui/handle/123456789/2885 2018-11-27T11:15:23Z 2013-01-01T00:00:00Z

Faculty Publication List : Dept. of M.E.F. , 2012-13 Na Annual Publication List - Department of M.E.F, 2012-2013

2013-01-01T00:00:00Z Na http://192.168.1.40:8080/xmlui/handle/123456789/2840 2018-11-27T11:20:37Z 2012-01-01T00:00:00Z

Faculty Publication List : Dept. of M.E.F. , 2011-12 Na Annual Publication List - Department of M.E.F, 2011-2012

2012-01-01T00:00:00Z Raychaudhuri, N. Das, S. K. Chakrabartty, Pran Krishna http://192.168.1.40:8080/xmlui/handle/123456789/2446 2013-04-02T12:14:13Z 2005-01-01T00:00:00Z

Symbiotic effectiveness of a siderophore overproducing mutant of Mesorhizobium ciceri. Raychaudhuri, N.; Das, S. K.; Chakrabartty, Pran Krishna Mutants of Mesorhizobium ciceri BICC 651 were generated by N-methyl-N'-nitro-N-nitrosoguanidine mutagenesis. Siderophore overproducing mutants were identified on Chrome azurol S agar plates. One of them determined as N15 was examined for symbiotic efficiency and compared to its wild type parent i.e. BICC 651 strain under sterile conditions using Leonard jars in growth chamber and also in pots containing nonsterile alluvial field soil. It was observed that the strain N15 produced about 30% higher number of nodules per plant, fixed 25% more nitrogen per gram of nodule and caused more than 30% increased dry weight of plant shoots.

2005-01-01T00:00:00Z Roy, S. Chakrabartty, Pran Krishna http://192.168.1.40:8080/xmlui/handle/123456789/2441 2013-04-02T11:56:12Z 2004-03-01T00:00:00Z

Deterioration of soil physicochemical properties, microbial biomass C, and N-mineralization due to replacement of sal forest with exotic species and rain-fed agriculture in East India Roy, S.; Chakrabartty, Pran Krishna Effects of conversion of natural forest dominated by Shorea robusta, supported on old alluvial soil, to exotic Eucalyptus tereticornis or Acacia auriculiformis plantation or to agricultural field for cultivation of rice, have been examined in respect of soil microbial biomass C, N and N-mineralization. Mean annual microbial C and N, respectively were 702 μg g -1 and 85 μg g -1 in the Shorea forest, 678 μg g -1 and 89 μg g -1 in the Acacia plantation, 627 μg g -1 and 73 μg g -1 in the Eucalyptus plantation and 349 μg g -1 and 60 μg g -1 in the cropland. Highest biomass was manifested during the summer and lowest in the rainy season in all the sites examined. Peak N-mineralization was obtained during the rainy season in the following order - the Shorea forest > the Acacia plantation > the Eucalyptus plantation > cropland. Thus, the Eucalyptus plantation appears to have lower soil microbial activity than the Shorea forest as well as the Acacia plantation. The control of microbial C and N on N-mineralization was maximum in the Shorea forest and minimum in the Eucalyptus plantation although correlation between microbial N and N-mineralization was insignificant in the Acacia plantation (may be due to localized chance fluctuations). Tendency to immobilize nutrients was maximum in the Eucalyptus plantation as evidenced by the low release of nutrients from microbial biomass during the rainy season. It was found that the Eucalyptus plantation soil was microbially more inert in terms of nutrient release from soil biomass and N-mineralization than that of the Acacia plantation as well as the natural Shorea forest. However, any type of exotic species plantation as well as agriculture have adversely and significantly affected the micro biota mediated soil fertility fabrication of the natural Shorea forest milieu.

2004-03-01T00:00:00Z