As per the Service Tax Notification No. 25/2012 dated 20.06.2012 (Serial No. 21)
[21. Services provided by a goods transport agency, by way of transport in a goods carriage of,-
(a) agricultural produce;
(b) goods, where gross amount charged for the transportation of goods on a consignment transported in a single carriage does not exceed one thousand five hundred rupees;
(c) goods, where gross amount charged for transportation of all such goods for a single consignee does not exceed rupees seven hundred fifty;
42[(d) milk, salt and food grain including flours, pulses and rice; ]
25[(e) chemical fertilizer, organic manure and oil cakes; ]
(f) newspaper or magazines registered with the Registrar of Newspapers;
(g) relief materials meant for victims of natural or man-made disasters, calamities, accidents or mishap; or
(h) defence or military equipments;]
26[(i) cotton, ginned or baled.]
Observing the above Notfn. it is related with essential services, but as far as manufacturing activity one should go with the limit with ₹ 750/- and pay ST accordingly