Process of Urbanization and Population Dynamics in Dakshin Dinajpur District, West Bengal – A Geographical Analysis

2017 ◽  
Vol 7 (11) ◽  
pp. 1
Author(s):  
Beauty Das
Keyword(s):  
Population Dynamics ◽  
West Bengal ◽  
Geographical Analysis ◽  
Process Of Urbanization

Population Dynamics Among the Totos of West Bengal: A Positive Response to Culture Contact

1983 ◽  
Vol 15 (2) ◽  
pp. 237-245 ◽  
Author(s):  
Debasish Sinha ◽  
Bikas Chandra Pal
Keyword(s):  
Population Dynamics ◽  
Population Structure ◽  
Death Rate ◽  
Birth Rate ◽  
West Bengal ◽  
Positive Response ◽  
Developmental Change ◽  
Demographic Data ◽  
Culture Contact ◽  
Sex Structure

SummaryThe population structure of the Toto tribe at Totopara, a small village in West Bengal, District Jalpaiguri, was studied, for since 1951 the Totos have been coming more and more in contact with the outside world and undergoing a process of cultural and developmental change. Demographic data presented include the age-sex structure, marital status, fertility, birth rate, death rate and population growth trends in the pre-contact and contact era. At present the population shows a trend towards increase.

scholarly journals Dynamics of Sclerotium rolfsii as influenced by different crop rhizosphere and microbial community

2017 ◽  
Vol 9 (3) ◽  
pp. 1544-1550 ◽  
Author(s):  
K. Ray ◽  
K. Sen ◽  
P.P. Ghosh ◽  
A. Roy Barman ◽  
R. Mandal ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Microbial Community ◽  
West Bengal ◽  
Plant Cover ◽  
Sclerotium Rolfsii ◽  
Cropping System ◽  
Damping Off ◽  
Microbiological Parameters ◽  
Level Of Significance

This study was carried out with the aim of evaluating pathogenicity of Sclerotium rolfsii to different crops influenced by different crop rhizosphere microbes and their population dynamics. Napier was found to be non-preferred host against S. rolfsii pathogen. Among the seven tested crops in micro-plot study, highest level of induction of sclerotial population was observed in groundnut and cow peas (21.81 and 20.06 numbers of sclerotia /100 g of soil, respectively), whereas, reduction in sclerotial number was observed in napier, maize and sorghum plots. S. rolfsii induced damping off was found to be significantly positively correlated with average sclerotial population irrespective of plant cover even at 1% level of significance (r = 0.985) and among the microbiological parameters, FDA was found to be significantly negatively correlated with damping off disease percentage at 5% level of significance (r = - 0.830). Therefore, Napier may be the potential crop to be incorporated in the sequence of rice/vegetable based cropping system in West Bengal for management of this dreaded pathogen.

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