There was no significant difference among the treatments with 25 and 50% of urea for variable number of roots. The average values observed were 6.6 and 6.0 respectively. In relation to the radicular system in these treatments, there was significant difference. By using 25% of urea in the culture medium, the average value observed was of 7.28 cm. When using 50% of urea, the average value was of 6.85 cm.