You can get clue from this old Notification which has been rescinded in 1990
Vegetables and roots, etc.
In exercise of the powers conferred by sub-rule (1) of rule 8 of the Central Excise Rules, 1944 and in supersession of the notification of Government of India in the Ministry of Finance (Department of Revenue) No. 30/82-Central Excises, dated the 28th February, 1982, the Central Government hereby exempts goods of the description specified in the Schedule annexed hereto and falling under Sub-heading No. 0701.10 of the Schedule to the Central Excises Tariff Act, 1985 (5 of 1986), from so much of the duty of excise leviable thereon under section 3 of the Central Excises and Salt Act, 1944 (1 of 1944) as is in excess of ten per cent ad valorem.
THE SCHEDULE
(1) Bottled or canned vegetables specified under Part V of the Second Schedule to the Fruit Products Order, 1955, issued by the Central Government under section 3 of the Essential Commodities Act, 1955 (10 of 1955).
(2) Dehydrated peas, dehydrated vegetables.
2. This notification shall come into force on the 28th day of February, 1986.
[Notification No. 28/86-C.E., dated 10-2-1986]