IntroductionSoil structure in paddyfield 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,