One who buys two trees in the field of another has not acquired any land. R' Meir says: He has acquired land. [If] they grew, he may not trim [them]. Whatever grows from the trunk belongs to him; from the roots, to the owner of the land; and if they died the land is not his.  [If] he bought three, he has acquired land. [If] they grew, he may trim [them]; whatever grows from the trunk and the roots belongs to him, and if they died the land is his.

One who sells the head of a large animal has not sold the legs; [if] he sold the legs, he has not sold the head. [If] he sold the trachea, he has not sold the liver; [if] he sold the liver, he has not sold the trachea. However, in [the case of] a small animal, [if] he sold the head, he has sold the legs; [if] he sold the legs, he has not sold the head. [If] he sold the trachea, he has sold the liver; [if] he sold the liver, he has not sold the trachea.