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2. After digging out the bulbs for grading bulbs, clean up the soil first and then screen and grade them. Dispose by size (perimeter). According to internationally accepted specifications, bulbs with a circumference of 12 cm or more can be used for cut flower production. Some producers also use about 11 centimeters of bulbs, but the quality of the flowers may be affected; 9 to 11 centimeters of ball can be cultivated for open field cultivation; smaller bulbs can be planted and cultivated to grow to cut flowers. The standard of the ball.
1, harvest time body; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman> When the tulip bulbs have yellowed ground, the ball can be dug out. Watering should be stopped 15 to 20 days before digging, and care should be taken not to injure the skin when digging the ball, because once the epidermis is broken, the bulb is susceptible to disease.