The tune, named THE TREES OF THE FIELD, was written by Jewish American musician Stuart Dauermann (b. 1944). It has irregular meter, and a 4/4 time signature. The original publication was in the key of Em, and the first few notes in this key are B, EF G F E.
The song was first published in 1975 by Lillenas Publishing Co, New York, and has been included in many collections since. In the UK, it is in the in-print Catholic Hymns Old and New, 2009 from Kevin Mayhew Publications.