I am a B.Sc agriculture student. I want to do MBA after my UG graduation. Which type of preparation should I do?

You should opt for marketing Mba and daily study about marketing campaigns through Brand equity in economics Times and can check website like Afaqs.com, socialsamosa.com. You have to prepare for entrance exams like Cat & Cmat through coaching institutes like Tine, Cplc, Catking.