i am graduate in agriculture and wish to pursue career in agriculture field

Hi Bhanuday, Civil services exam conducted by UPSC are one of the most competitive exams held all over India so to recruit the creme of the lot for the premier job vacancies in the State/ Central Government. You can definitely apply for the same as the minimum eligibility requirement is a graduate

Well the best way to get succes in civil services is to join a good coaching institute like RAUs, Nirvana, Chanakya etc. They have very good conversion rates. Also, they will guide you well and provide very weel structured content.