Your wife generally does not have a legal right to claim a share in her father's agricultural land if it's considered his self-acquired property, even if inherited from his father. This is because it's not considered ancestral property in her hands. Your father-in-law can typically transfer or sell this land as he sees fit without his daughter's consent. However, it's advisable to check specific state laws, as some may have provisions regarding married daughters' shares in agricultural land.