Root qualities of carrot in terms of soluble solids, - and - carotene, and ascorbic acid content were not affected by the interaction of perlite sizes and concentrations of nutrient solutions used in this experiment (Table 2). Two perlite particles (1.2 and
5.0mm) investigated had no influence on the above qualities of carrot root. Soluble solids contentwas differed in carrot root grown in different concentrations of nutrient solutions but carotenoids and ascorbic acid content were not affected significantly. It was significantly increased in root grown with 50 or 75% of nutrient solution
than grown with other concentrations.