Charles Ellicott Commentary 1 Chronicles 27:28

"and over the olive-trees and the sycomore-trees that were in the lowland was Baal-hanan the Gederite: and over the cellars of oil was Joash:" — 1 Chronicles 27:28 (ASV)

Olive trees. —The same word (zéthîm) is rendered “olive yards” in Joshua 24:13; 1 Samuel 8:14, and elsewhere in the Authorized Version.

The sycamore trees that were in the low plains. —The sycomores that were in the Shephelah or lowland of Judah, between the hills and the sea (Joshua 15:33). The Ficus sycomorus, or fig-mulberry, a beautiful evergreen tree, indigenous to Egypt, was once abundant in Palestine, as appears from 1 Kings 10:27; 2 Chronicles 1:15. Its small sweet figs were much eaten by the poor. (Compare Amos 7:14.)

Baal-hanan (“The Lord bestowed”).—An older form of Jehohanan. (Compare the Phoenician Hannibal.)

The Gederite. —Of Geder, or Gedor, a town in the hill-country of Judah (Joshua 12:13; Joshua 15:58).

Over the cellars of oil. —Heb., treasures, or stores of oil. The oil was that of the olives. (Compare Judges 9:9.)