The Jubilee year is similar to Rosh Hashanah regarding the blowing [of the shofar] and the benedictions.  R’ Yehudah says: On Rosh Hashanah [we] blow with rams’ [horns], and on the Jubilee years with wild goats’ [horns].

Ashofar that was split and he glued it together, it is invalid. If he glued together broken pieces of a shofar, it is invalid. If there is a hole [in the shofar] and he sealed it: if it hinders the blowing, it is invalid; and if not, it is valid.