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Soil Nutrient Status of Brahmaputra Floodplain Area in Tangail Sadar Upazila for Agricultural Uses

M. A. M. Hossen
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh.

S. A. Lira
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail1902, Bangladesh.

M. Y. Mia
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail1902, Bangladesh.

A. K. M. M. Rahman
Soil Resource Development Institute, Tangail, Bangladesh.

Abstract/ Executive Summary:

Soil samples from high land, medium high land, medium low land and low land of Brahmaputra Floodplain area showed that pH of the soils were slightly acidic; organic matter (OM) content was medium; total nitrogen (N), available potassium (K) and boron (B) content were low; available phosphorus (P) content was very low; available sulfur (S) and calcium (Ca) content were medium to very high; magnesium (Mg) and zinc (Zn) content were low to optimum; copper (Cu), manganese (Mn) and iron (Fe) content were very high suggesting the fact that soils of this area is moderately suitable for agricultural uses.

Keywords: Agricultural uses; Brahmaputra floodplain area; Soil nutrient status

Location: Tangail district

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Soil fertility

Objectives:

(i) To determine nutrient status of Brahmaputra floodplain area.

(ii) To compare nutrient status of Brahmaputra floodplain area with Fertilizer Recommendation Guide (FRG) standard for agricultural uses.

Methodology:

Brahmaputra floodplain area at Tangail Sadar upazila of Tangail district located in between 24°10´ and 24°22´ North Latitudes and in between 88°46´ and 89°59´ East Longitudes. The study area was divided into four types of land namely high land, medium high land, medium low land and low land. Soil samples were collected from the agricultural land of the above four land types. The samples were collected from the study area within a depth of 15 cm. Total 26 soil samples were collected from seven different areas as Mogra, Baghil, Gala, Gharinda, Tangail Sadar, Danya, and Porabari. The collected soil samples (500 g) were air dried, ground and sieved for analysis. Soil pH was measured by soil pH and Moisture Meter. The Organic Matter (OM) content was analyzed Titrimetrically by Walkley and Black’s Wet Oxidation method with oxidation of organic matter with potassium dichromate (K₂Cr₂O₇ ). Total N content of soil was determined by Micro Kjeldahl method. Available phosphorus was extracted from the soil by shaking w ith 0.03 M NH₄F – 0.025 M HCl solution at pH < 7.0 following the method of Bray and Kurtz method. The samples were read with the help of a Spectrophotometer at 660 nm wave length. Available sulphur was determined by extracting the soil samples by calcium dihydrogen phosphate extraction method. Exchangeable K content was determined with the help of flame emission Spectrophotometer using K filters by ammonium acetate extraction method. The available calcium (Ca) and magnesium ( Mg) contents were extracted by ammonium acetate extraction method and determined by Ethylenediamene Tetra Acetic acid titration. Available zinc (Zn), copper (Cu), manganese (Mn) and iron (Fe) were determined by DTPA extraction method using NOVAA - 300 Atomic Absorption Spectrophotometer. Boron (B) content was analyzed according to Hot - water extraction method by dilute calcium chloride solution. The Microsoft Office Excel software was used to present and interpret the collected data.

Source of Information: J. Environ. Sci. & Natural Resources, 8(2): 11-14, 2015, ISSN 1999-7361

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/jesnr.v8i2.26856

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study concluded that pH of the soils of Brahmaputra floodplain area was slightly acidic. The total N, available P, K, Mg and Zn content of the soils were unsuitable for agricultural uses. The OM content was moderately suitable for agricultural uses. Only total Ca and S content were suitable for crop production. But Mn, Fe and Cu content were at very high level, which may reduce crop production. Overall soils of Brahmaputra floodplain area were moderately suitable for agricultural uses.

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