Baba Basra 5:4-5

Baba Basra 5:4

If one person buys two trees in another person’s field, has does not acquire the ground; Rabbi Meir says that he does. If the trees grow, the owner of the land is not permitted to trim them. Anything that grows from the trunk belongs to owner of the trees and anything that grows from the roots belongs to the owner of the ground. If the trees died, the owner of the trees has no rights to the ground (so he cannot replace them). A person who buys three trees does acquire the ground. If these trees grow, he may trim them and whatever grows belongs to him regardless of whether it grew from the trunk or from the roots. If the trees die, he has rights to the ground (so he may replace them).

Baba Basra 5:5

If a person sells the head of a large animal, the sale does not include the legs; selling the legs does not include the head. Selling the trachea does not include the liver, nor vice versa. With a small animal, selling the head includes the legs but selling the legs does not include the head. Selling the trachea includes the liver but selling the liver does not include the trachea.