Related do Challa 4:12

We do not bring Bikkurim (first fruits) before Shavuot, and if they are [nonetheless] brought, we must wait until Shavuot arrives and [only then] recite the declaration [beginning with "My father was a wandering Aramean..." (Deut. 26:5-10)].

A Jew and a Gentile that bought a field in Syria, behold they are like untithed produce and like tithes that are mixed together, the words of Rebbi. Rabbi Shimon ben Gamaliel says, the portion [belonging to] the Jew are liable in tithes, and the portion [belonging to] the Gentile are exempt from tithes. A Jew that bought a field in Syria, even though he went back and sold it to a Gentile, [the field] is liable in tithes and in shevi'it (the laws of the sabbatical year), because it had previously been liable. But [in the case of a field owned by a Gentile but worked on by Jewish] sharecroppers or tenant farmers or the families [of Jewish sharecroppers], or [in the case where] a Gentile mortgaged his field to a Jew, even though he acted based on [Jewish] law, [the field] is exempt from tithes and from shevi'it [because ownership is retained by a Gentile, see Gitt. 43b:11].

[There is] a stringency with holy things in the Temple (i.e., sacrifices offered in the Temple) that does not exist with holy things in the outlying areas (i.e., Terumah, the gift of the shankbone, cheek and maw, first of the fleece, redemption of the first born, etc., see Ketubot 24b:15 and Minchat Yitzchak here), *and [a stringency] with holy things in the outlying areas that does not exist with holy things in the Temple. [*Note: The clause "and ... the Temple" is absent from the Erfurt manuscript.] [In regards to] holy things in the outlying areas, minors [are permitted in the] distribution of them and impure persons [are permitted in the] distribution them, and they distribute them in a state of impurity (contra. Tos. Terumot 10:18). And they weigh one against another (i.e., they may substitute an equivalent amount of unconsecrated produce for Terumah, see Lieberman). [In regards to holy things] in the Temple, [the Kohen himself] is responsible for them and must take care of them, and take them to the Chosen House (i.e., the Temple). [In regards to] holy things in the outlying area, [Kohanim] may only give them to a chaver (see Tos. Demai 2:2), [while in regards to] holy things in the Temple, they [may additionally] give them to priests of the guard (=לאנשי משמר, see Bikkurim 3:12; this translation follows the GR"A).