Commentary for Kiddushin 53:5
והא עלה קתני זו היא ששנינו נכסים שאין להם אחריות נקנין עם נכסים שיש להם אחריות בכסף בשטר ובחזקה ש"מ לא בעינן צבורים בה ש"מ:
The third: If the vendor anticipates [payment] and indites a deed for him [the vendee], in accordance with what we learnt: A deed may be written for the vendor<span class="x" onmousemove="('comment',' Viz., my field is sold to X.');"><sup>9</sup></span> even though the vendee is not with him,<span class="x" onmousemove="('comment',' Either where the vendee has already formally obtained a title thereto, or, according to Abaye, even without it, the mere attesting of such a deed causing the transfer.');"><sup>10</sup></span> then as soon as he takes possession of the land, the deed is vested [in the vendee] wherever it is.<span class="x" onmousemove="('comment',' Though not actually on the land.');"><sup>11</sup></span>
Daf Shevui to Kiddushin
And that folks ends our discussion of this issue. Movables may be acquired together with land even if the movables are not on that piece of land.
I should note that in the middle ages a technique developed whereby a person could transfer movables based on the idea that every Jew owns “four cubits of land in Israel.” I would give you (temporarily) my four cubits of land and with that I could also give you my movables, even if the movables were far way. This facilitated the transfer of movables without one actually having to own land, let alone put the movables on the land.