Summary:
רש"י (and the ריצב"א) explain that the lid will shake when it is on top of the אפדנא wall; while the ר"ת maintains that it will shake while holding it in your hand
It is the wind that brings it - זיקא הוא דקא ממטי לה
Summary:
תוספות distinguishes between the case of רבינא and the cases of אש and גץ. We either do not rule like רבינא or we can differentiate between wind and animals.
Why is this different from winnowing and the wind assists him - מאי שנא מזורה ורוח מסייעתו
Summary:
רבינא maintains that just like we cannot derive a חיוב from שבת, we cannot derive הרחקה, while מר בר ר"א maintains that while גרמא is indeed פטור but it is אסור.
Whether grapevines or whether any tree - אחד גפנים ואחד כל אילן
Summary:
The משנה mentions גפנים, according to רש"י, to teach us that if there is a גדר there is no איסור כלאים. According to תוספות it needed to mention גפנים and אילן, so we should not mistakenly assume that distancing ד"א applies only to גפן.