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Properties of Some Pedons from the Rubber Plantations of Madhupur Tract in Bangladesh

M. A ZAMAN.
Department of Soil Science, University of Dhaka, Bangladesh

M. S. Hussain
Department of Soil Science, University of Dhaka, Bangladesh

A. S. M. Mohiuddin
Department of Soil Science, University of Dhaka, Bangladesh

A. R. Mazumder
Department of Soil Science, University of Dhaka, Bangladesh

Abstract/ Executive Summary:

Twenty five soil samples belonging to five pedons from the rubber plantations of Madhupur tract were studied for their morphological, physical and chemical characteristics. The soils are fine-textured and have developed on the Madhupur clay parent materials. Argillic horizons have been found in the profiles. Argilluviatlon is thought to be the major pedogenic process. All the soils are acidic in nature and the cation exchange capacity (CEC) ranged from 9.8 to 14.5 me/100 g soil. Percent base saturation ranges from 18 to 34 percent. These soils have been characterized as Typic Paleustults according to soil taxonomy and as Orthi-Ferric Alisols according to FAO-UNESCO soil legend.

Keywords: Pedons, Rubber plantation, Dadhupur tract, Soil

Location:

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Land management

Objectives:

Objective of the study was to determine the morphological, physical and chemical properties of the soils from the rubber plantation in the Madhupur tract.

Methodology:

Soil samples from five pedons were collected from five locations of Pirgacha block of Madhupur rubber plantations. With an area of 2900 ha Pirgacha block is the largest plantation area. where 1000 ha had already been planted by 1989 and another 1,500 ha were planted by 1993. The soil samples were collected on natural horizon basis and the pedons were named after the locality from where they were collected and correlated with the Soil series names of SRDI Staff (1965-75). The pedons were morphologically described in the field according to the USDA system (Soil Survey Staff 1951) and their coded morphological description. Particle size distribution of the soils was carried out by hydrometer method (Day, 1965). Soil pH was determined with a pH meter in a suspension with a soil-water (or KCI) ratio 1:2.5. Organic carbon was determined by wet oxidation method of Walkley and Black (Jackson 1962). Cation exchange capacity was determined by the ammonium acetate method as described by Black (1965) and exchangeable Na⁺ and K⁺ were determined from the same extract using a flame photometer.

Source of Information: J. Asiat. Soc. Bangladesh. Sci. 19 (1) : 15-22. 1993

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Dull yellow orange to dark brown and dull orange to brown colours occur respectively in the surface and subsurface horizons of the soils. The variation of colour from surface to subsoil horizons occurs due to the movement and fixation of iron and alumtntum oxtdesIrom surface downwards. Addition of organic matter is responsible Ior dusky colour of the surface soils. The red and grey mottled layer is believed to has been formed under the Influence of a seasonally fluctuating groundwater table. Iron on oxidation gradually segregated into brown and red mottles. The iron manganese enriched indurated concretions are quite abundant in the soils.

Knowledge Management: Journal