PROBLEM TO BE SOLVED: To provide a method for preventing culture soil loss when transplanting a sugar beet seedling in a paper cylinder. SOLUTION: This method for lessening soil loss from a paper cylinder when transplanting a sugar beet seedling includes adjusting an absolute water content of ground chaff to 8-34 ml/100 ml, and obtaining culture soil by mixing the chaff with fertilizer so as to raise a sugar beet seedling. COPYRIGHT: (C)2009,JPO&INPIT