The shortened stay of the President has surprised the Telangana government, which had extended an invitation to him for a conference.
The event will be attended by around 200 delegates from 60 countries.
Centre will complete project before 2019; water will be released through gravity flow canals by March that year.
The politically dominant Kapus in Andhra Pradesh have been included in the other backward classes (OBC) category, with a 5% reservation in educational institutions and government jobs.
Water Resources Ministry blocking the replacement of the existing contractor of Polavaram irrigation project.