Acid sulphate soils of Bangladesh, their characteristics and land use system
1990
Rahman, S. | Islam, W. | Parveen, Z. (Dhaka Univ. (Bangladesh). Dept. of Soil Science)
About 71, 000 hectares of acid sulphate soils have been recognized as problem soils in the coastal zone of Bangladesh. They have been grouped into actual, potential and buried acid sulphate soils. The soils are very poor to poorly drained with colour ranging from dark grey to grey. The texture is silty clay loam to clay and the soil pH is less than 4. Potential acid sulphate soils have on jarosite minerals. On the other hand, the actual and buried acid sulphate soils have jarosite minerals within the profile at different depths. Most of the acid sulphate soils in Bangladesh are, at present, lying fallow except some being used for a single or double cropping of rice and production of shrimp and salt alternatively depending on topography of the land, flooding irrigation facilities, drainage salinity, and acidity of the soils. Rice and shrimp yields are commonly as low as 0.5 to 0.75 to 1.0 t/ha respectively.
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