Sukkah 44a and Sukkah 44b, why we observe lulav for seven days in commemoration of the Temple, and aravah only one day, whether aravah is a Biblical or halachah le-Moshe mi-Sinai, or was set up by the prophets, either as a fixed practice or a custom, the needed appearance of the aravah, and how we fulfill the practice. With scattered shemittah issues as well.
