An Asian Journal of Soil Science

D. Pal ¹, P. K. Patra ¹, D. Mukhopadhyay ²

Affiliations
1 Department of Environmental Studies, Sikshsa-Bhavana, Visva Bharati, Santiniketan (W.B.), IN
2 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya Pundibari, Cooch Behar (W.B.), IN

Abstract

A study under four different eco-systems (forest land, agricultural land, tea garden and fallow land) was conducted under Terai situation of West Bengal to characterise the soils with important physico-chemical properties and also to find out the available nutrient status in soils with the increasing depth. It was observed that the available N-P-K of the soils and the exchangeable (Ca⁺² + Mg⁺²), electrical conductivity (EC), oxidisable organic carbon (OC) and total C-H-N-S in soil significantly varied with the depth of soils in most of the cases. The soils were acidic in reaction and non-saline in character. The available N-P-K and OC of soils of forest, agricultural and tea-garden differed with the uncultivated fallow. The survey of the regions showed that the buildup of nutrients (N-P-K, Ca⁺² + Mg⁺²) varied with the changing ecosystems as reflected by the C/N, C/S and C/H ratio of the soils.

Keywords

Ecosystem, Nutrients, Physico-Chemical.

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A. Mahato ¹, D. Mukhopadhyay ²

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar (W.B.), IN
2 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar (W.B.), IN

Abstract

An experiment was conducted with rice (cv. GOTRA BIDHAN - 1) in soils of Terai alluvial situation of West Bengal during the Rabi season of 2009-2010 to find out the effect of some primary (N-P-K) and micro (Zn-B) nutrients along with organic matter on the variability of yield of rice. The treatments were based on the soil-test based fertilizer recommendation . The average grain and straw yield of rice varied from 2.28 to 4.31 t ha^-1 and 3.12 to 4.67 t ha^-1, respectively. Maximum grain yield of rice was obtained at the optimum application of the given nutrients. Omission of nutrients from the optimum, caused yield losses from 9.9 to 47.1 per cent. The yield data also revealed that N-P-K-Zn and B were the main limiting factors under the present experimental set-up. The results suggested the need for applying the given nutrients at optimumlevels for the successful yield maximization programme.

Keywords

Rice, Nutrients, Optimum Levels, Yield Maximisation.

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