First of all, from where this land has been acquired/origin. Is it self earned/ancestral/govt. allotted under some scheme or govt. aid for agriculture purpose/lease ?
Check the revenue record, USE of land, if it for agriculture purpose than it cannot be in any way be use for cremation.
Avoid panchayat claims, or file a suit to restrain panchayat to proceed any manner against the land, neither the panchayat has the jurisdiction.
If it is govt. allotted, or under your possession just like that than you can seek title on the land by theory of adverse possession.
Details required - source of land and since when it is in your mother `s name in revenue record. ?
Read judgement below -
Supreme Court of India
R.Hanumaiah & Anr vs Sec.To Govt.Of Kar.Rev.Dept.& ... on 24 February, 2010
Bench: R.V. Raveendran, Swatanter Kumar
Mere temporary use or occupation without the animus to claim ownership or mere use at sufferance will not be sufficient to create any right adverse to the Government. In order to oust or defeat the title of the government, a claimant has to establish a clear title which is superior to or better than the title of the government or establish perfection of title by adverse possession for a period of more than thirty years with the knowledge of the government. To claim adverse possession, the possession of the claimant must be actual, open and visible, hostile to the owner (and therefore necessarily with the knowledge of the owner) and continued during the entire period necessary to create a bar under the law of limitation.