Soil structure in paddy field changes after puddling and during the rice growth period due to irrigation and drainage. Puddling is a most common method of land preparation for transplanting of rice seedlings and for controlling weeds and reducing leaching of water and nutrients (De Datta and Craswell, 1982; Sharma and De Datta, 1985). Puddling is associated with the soil disturbance through tillage operations, at or near water saturation. The puddling tillage usually comprises one or two ploughing and two or morehar ro wings and a final leveling. Puddling leads to breakdown of soil aggregates into ultimate micro aggregates and individual particles, forming a muddy suspension having dispersed fine particles with little resistance to water flow, and to compaction of subsoil due to machinery used for tillage, forming a plough pan with a high bulk density (Singh, 2011).