If a man has decided to adopt a woman’s child for his own, that child should be treated equally to the blood children.
Maybe the husband can give the adopted daughter a cash equivalent settlement that is equal to her share, if the land is that important to be kept in the family.
That would be reasonable, imo. It doesn’t deny the daughter a share of the inheritance and it keeps the land in the blood family.
I don’t see where he adopted her, plus the article refers to him as the “Stepfather”, if adopted wouldn’t he be referred to as the “father”?
Also, what about the daughter’s real father, is she in line for inheritance from him that would not be shared with her siblings?
A common sense solution.