סי' יז ויהי הם מריקים שקיהם

The author defers entirely to Likutay Halachos, Laws of Lulav, Law 2, where it is explained how the topic of Rosh HaShanah, Shofar-sounding, Sukkos, and the Four Species all revolve around this discourse. He notes that although more could be explained, he chose to be brief here.