- Singh, Umrao et al (1990). Dictionary of Economy plants in India pp. 244.
A field experiment was carried out during kharif 1998–99 and 1999–2000, comprising of two methods of sowing (broadcast and line sowing) and seed rates (5,6,7 and 8 kg/ha) tested in split plot design with four replications. The results did not reveal significant variation due to sowing methods in morphological growth attributes (except root length) of root yield and seed yield. But seed rates showed significant improvement in morphological growth parameters like plant height, fresh weight of roots and dry root yield per plant which was maximum at 5 kg/ha seed rate. Further increase in seed rate did not show improvement in growth parameters per plant. But root yield and seed yields per hectare were increased up to 7-kg/ha seed rate.