Who holds the copyright for The Tender Land by Aaron Copland?

Answer 1

Simple: Aaron Copland, and in the case of his death, his estate.
Published music is automatically copyrighted by the composer, and does not become eligible for public domain until at least 70 years after death. Since Copland died in 1990, his music is copyrighted in the US until the year 2060.

Answer 2

The copyright for "The Tender Land" by Aaron Copland is typically held by the publisher of the music or by the estate of the composer, depending on the specific agreement and the date of publication. It's advisable to consult the publisher or an authoritative source to determine the current copyright status.