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Laskar B.A.,Assam University | Rawat J.S.,Rajiv Gandhi University | Dasgupta M.,Bidhan Chandra Krishi Viswavidhyalaya | Biswas S.P.,Dibrugarh University | And 2 more authors.
Ecology, Environment and Conservation | Year: 2013

There is lack of protection measures and scientific management activities for fishes in the Protected Areas of North-East India. Owing to increased anthropogenic and climatic distress, the Mahseer fishes are declining at an alarming rate in their native distribution areas. This communication focuses a conservation application through introduction of two very important species of the valued Indian Mahseer in an upland lake Mehao. The study highlights the scope and potential of such undisturbed and vast water bodies for long-run conservation of threatened/endangered fishes particularly the indigenous Mahseer, through rehabilitation. The results of the study provoke the recognition of the lake as 'Mahseer reserve' in order to pay management attention in the lake. Copyright © EM International.

Lungmuana,Bidhan Chandra Krishi Viswavidhyalaya | Ghosh S.K.,Bidhan Chandra Krishi Viswavidhyalaya | Patra P.K.,Bidhan Chandra Krishi Viswavidhyalaya
Journal of the Indian Society of Soil Science | Year: 2012

Phosphorus in soil is present in both organic and inorganic forms. In general, inorganic P is the predominant form of soil P, constituting 20 to 80% of the total P in the surface layer (Tomar 2003). It is the inorganic fraction, which is more intimately related to phosphate nutrition to plants in agricultural soils. Phosphorus transformation in soils involves complex microbiological, chemical and biological processes. Plant availability of inorganic P can be limited by the formation of sparingly soluble calcium phosphate in alkaline and calcareous soils; by adsorption onto Fe and Al oxides in acid soils and by formation of Fe and Al phosphate complexes with humic acids (Gerke 1992). The nature and distribution of different forms of P have provided useful information for assessing the available P status of soil and for estimating the degree of chemical weathering of the soil, P deficiency, etc. Estimation of available P indicates only the amount of P present in soil solution and soil surface which is available to plants but it does not indicate about the relative contribution of different fractions of P towards available P. Thus understanding of the relationship between various forms of P, their interactions in soil and various factors influencing P availability to plants is essential for efficient P management in soil.

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