The present investigation was carried out agricultural college, Bapatla, ANGRAU, Hyderabad, India, with title Response of rice (Oryza sativa L.) to top dressing of phosphorus through complex fertilizers the objective of evaluate the to study the effect of top dressing of phosphorus through complex fertilizers on growth and yield of rice. to find out the optimum time of application of phosphorus through complex fertilizers for rice. to find out a better source of phosphorus for top dressing in rice during 2009-10. The findings of the experiment revealed that All the growth parameters such as plant height, total number of tillers m-2 and drymatter were not significantly influenced by sources of P at different times of application, except drymatter at 30 and 90 DAT