A comparative study was carried out with four different seedbed preparation methods to determine the effect of different seedbed prepration methods on physical properties of soil. The methods were: Method I: chisel + disc harrow + float; Method II: mouldboard plough + disc harrow + float; Method III: mouldboard plough + rotary cultivator + float; and Method IV: chisel + rotary cultivator + float. In comparison with other methods, using rotary cultivator in Methods III and IV reduced the soil moisture content more rapidly and the penetration resistance of the soil at the depth of 5 and 10 cm. The minimum decrease in soil moisture content was observed at Method I during seven days. The least bulk density and highest porosity values were determined atMethods III and IV.
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