wholesale foodgrain businee

I have my wholesale food grains trading business in which we sell goods like chandaal. rahar dall masoordall etc. all of which are non taxable items . I want to ask that we buy these goods from mandis like m.p, u.p and goods via road transport in trucks so I want to ask is there any gst or tax.. previously there was no tax and in gst also food grains are non taxable..suggest