Land partition issue

Dear Experts,

kindly suggest regarding the issue.

7.25 ACRE AGRICULTURAL LAND IS IN JOINT A/C OF MY DAD & MY DAD'S ELDER BROTHER.

FROM PAST 15 YEARS,  MY DAD'S ELDER BROTHER IS LOOKING AFTER THE LAND.

WE ARE TRYING TO MAKE PARTITION OF THE LAND EQUALLY BETWEEN THEM, BY NEGOTIATION.

BUT MY DAD'S ELDER BROTHER IS NOT READY TO MAKE PARTITION OF THE LAND.

KINDLY SUGGEST, HOW CAN WE MOVE TOWARDS MAKING PARTITION OF THE LAND.

Thanks and regards,

Harsha.H