A study on the fertilizer requirement of cabbage, cv. September, was conducted with 3 levels each of N (0, 50 and 100 kg/ha). P (0. 25 and 50 kg/ha) and K (0, 50 and 100 ka/ha). The polar diameter, equatorial diameter and weight of head showed linear response to the increasing levels of N and P. while response to K was only moderate. Among the first order interactions, the interaction effects of N and P were more pronounced than the effects of N and K and P and K interactions. The shape of head was not altered due to app lication of varying levels of N. P and K. Application of N at 100 kg. Pat 50 kg and K at 50 kg per hectare was found to be optimum, recording the highest weight of 2.280 kg per head with an estimated vield of 67.66 tonnes per hectare.
Natarajan et al. (Thu,) studied this question.