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Experimental studies on the population density of the different age group of Drawida willsi (Michelson) in controlled and malathion treated pot

Kumari Swarnima* & R. K. Singhb
aDepartment of Zoology, A.S.College Deoghar
bDepartment of Applied Chemistry, C.I.T., Tatisilwai, Ranchi, India
Received 3rd November, 2010; Revised15th February, 2011

Abstract : Population of earthworm in soil has a particular role as regards the fertility of the soil is concerned. (Lee1). The role, the earthworm plays is of significance specially to farmers and cultivators and person interested in horticulture, floriculture etc. as they contribute to overall productivity of the soil ecosystem by maintaining the structure of the soil and regulating the turn over of organic matter, through feeding, casting and burrowing (Das2, and Lee1). They possess capability to displace the soil, bring slow recolonization and plays a beneficial role in agroecosystem.
Drawida willsi (Michaelson) a dominant earthworm species of tropical agro-ecosystem of Jharkhand, has not been studied in detail from ecological viewpoint. The present communication records for the first time the population density of the different age group (juvenile; immature, mature) of the species in controlled and malathion treated pots.


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