Peat is generally found in thick layers in limited areas, has low shear strength and high compressive deformation which often results in difficulties when construction work is undertaken on the deposit. Peat represents the extreme form of soft soil. It is an organic soil which consists more than 75% of organic matters. However, the cutoff value of the percentage of organic matter necessary to classify a superficial deposit or soil as peat varies throughout the world, usually depending on the purpose of classification.
This cutoff value also serves to differentiate peat from superficial deposits or soils with lesser amounts of organic content. The terms peat and organic soils, used for describing soils with an organic content, were once synonymous but term organic soils is presently used for superficial deposits or soils that contain organic matter. Figure 1 Location of Peat Soil in Malaysia PEAT SOIL SUBSIDENCE Draining of peatland lowers water table causing subsidence
Rate of subsidence 20 – 50 cm per year over a period of 5 years after drainage & thereafter 5 cm per year. Oxidation & acidity: Peatland water is acidic & once drained, peatwater causes severe damage to flora & fauna habitats in adjacent areas. Compaction or shrinkage of peat soils may cause groundwater containing fertilizer or pesticide residues to flow from agricultural area to adjacent water catchment area.
The Essay on Soil And Fertilization Particles Soils Organic
Soil and Fertilization Soil is the superficial covering of most of the earth s land area. This soil is made up of minerals and organic particles produced by organic decay. The main components of soil are undissolved inorganic compounds, soluble nutrients, organic matter, water, and gases. The physical nature of soil is determined by the proportions of different sizes. Inorganic particles range ...
