Related su Terumot 2:12

One may not take terumah from one type on behalf of a different type, but they said (Ter. 2:4), all types of wheat are one, [and] all types of beans, and nuts, and almonds, and pomegranates are one, [and] we [may] take terumah and tithes from one on behalf of the other. [If] someone had black figs and white [figs] inside his house, and similarly, two types of wheat, we [may] take terumah and tithes from one on behalf of the other. Rabbi Yitzchak says in the name of Rabbi Eliezer, Beit Shammai say, we do not take terumah [in such cases], and Beit Hillel say, we [are permitted to] take terumah.

Rabbi Yosei says, every threshing house is combined into one (see Y. Ter. II.1.11). How is this done? (i.e., how should the threshing house be set up to accomplish this outcome?) One vat for two tanks; two vats for one tank; two vats for two tanks. At a time when everything is combined into one, we take terumah and tithes from one on the other. [If] one of them becomes impure, one takes terumah from the pure that is in it (i.e., in the threshing house) on behalf of the impure that is in it. [If] they are not combined together, one may not take terumah and tithes from one on behalf of the other. [Thus, if] one of them becomes impure, one may not take terumah from the pure that is in it on behalf of the impure that is in it. And similarly, Rabbi Yehudah says, the whole olive press is combined into a single beam. How is this done? One beam for two tanks, two beams for one tank, two beams for two tanks (see Y. Ter. II.1.13). At a time that the whole [olive press] combines as one, we take terumah and tithes from one on behalf of the other. [If] one of them becomes impure we [may] take terumah from the pure on behalf of the impure and tis in it. [If] they are not all combined into one, we may not take terumah and tithes from one on behalf of the other. [Thus, if] one of them becomes impure, one may not take terumah from the pure that is in it on behalf of the impure that is in it.

Rabbi Eliezer says, we [may] take terumah from the pure on behalf of the impure (Ter. 2:1). Said Rabbi Eliezer, it so happened the threshing floors caught fire in Kfar Signah, and they took terumah from the pure on behalf of the impure. They said to him, what proof is that? Rather, [we should conclude] that they took terumah "from them on behalf of them" (i.e., from pure produce on behalf of other pure produce). Rabbi Ilai (אלעאיי not אליעזר per Lieberman) said in the name of Rabbi Eliezer, they [may] take terumah from the pure on behalf of the impure, even [when it comes to produce that is in] liquids. How is this done? Whoever pickles olives in [a state of] impurity and seeks to take terumah from them in purity, he brings a funnel whose mouth is not wider than an egg, and places it on the mouth of an amphora, and brings the olives and puts them inside [the funnel] and takes terumah, and [in this way] he is able to take terumah from the pure on behalf of the impure or the "earmarked" (המוקף, see Tos. Kifshutah). They said to him, nothing is considered "fluid" but wine and oil (see Y. Chal. II.3.9). Rabbi Yosei says, he who takes terumah from the impure on behalf of the pure, whether inadvertent or intentional, his terumah is [valid] terumah (see Y. Ter. VI.1.6). Said Rabbi Yosei, why should there be any difference between this case (i.e., taking terumah from the impure on behalf of the pure) and the case of taking terumah from the bad [quality] on behalf of the good (which is valid terumah (Ter. 2:6 ))?

Rabbi Eliezer says, we [may] take terumah from the pure on behalf of the impure (Ter. 2:1). Said Rabbi Eliezer, it so happened the threshing floors caught fire in Kfar Signah, and they took terumah from the pure on behalf of the impure. They said to him, what proof is that? Rather, [we should conclude] that they took terumah "from them on behalf of them" (i.e., from pure produce on behalf of other pure produce). Rabbi Ilai (אלעאיי not אליעזר per Lieberman) said in the name of Rabbi Eliezer, they [may] take terumah from the pure on behalf of the impure, even [when it comes to produce that is in] liquids. How is this done? Whoever pickles olives in [a state of] impurity and seeks to take terumah from them in purity, he brings a funnel whose mouth is not wider than an egg, and places it on the mouth of an amphora, and brings the olives and puts them inside [the funnel] and takes terumah, and [in this way] he is able to take terumah from the pure on behalf of the impure or the "earmarked" (המוקף, see Tos. Kifshutah). They said to him, nothing is considered "fluid" but wine and oil (see Y. Chal. II.3.9). Rabbi Yosei says, he who takes terumah from the impure on behalf of the pure, whether inadvertent or intentional, his terumah is [valid] terumah (see Y. Ter. VI.1.6). Said Rabbi Yosei, why should there be any difference between this case (i.e., taking terumah from the impure on behalf of the pure) and the case of taking terumah from the bad [quality] on behalf of the good (which is valid terumah (Ter. 2:6 ))?

One who separates terumah and tithes on Shabbat, whether unwittingly or intentionally, his tithes are [valid] tithes, and one who immerses [impure] utensils on Shabbat, whether unwittingly or intentionally, the immersion counts (contra Ter. 2:3 [invalidating intentional tithing and immersion on Shabbat]).

We [may] take terumah of wheat on behalf of bread, but not bread on behalf of wheat except according to the proportion [of wheat in the bread]. We [may] take terumah of fresh figs on behalf of dried figs according to measure, and dried figs on behalf of fresh figs according to their number, but not fresh figs on behalf of dried figs according to their number, and not dried figs on behalf of fresh figs according to their measure. Rabban Shimon ben Gamaliel says, [with respect to] baskets of fresh figs and baskets of dried figs, they are all equivalent, [and we may] take terumah and tithes from this one on behalf of that one. Rabbi Yishmael son of Rabbi Yosei recounted, "My father would take 10 dried figs from the storage yard [and use them as tithes] on behalf of 90 fresh figs that were in the fruit basket."

We [may] take terumah of table olives (g'lofsin) on behalf of oil olives, but not oil olives on behalf of table olives (cf. Ter. 2:6, "olives to be preserved" rather than "table olives" and switching the order). Rabbi Yehudah says, [one may take terumah] even of oil olives on behalf of table olives. We [may] take terumah of clear wine on behalf of cloudy wine, but not cloudy wine on behalf of clear wine. Rabbi Yehudah says, [one may take terumah] even of cloudy wine on behalf of clear wine, as long as he takes terumah from the highest quality.

We [may] take terumah of unboiled wine on behalf of boiled wine, but not boiled on behalf of unboiled (Ter. 2:6). Rabban Shimon ben Gamaliel says, even the boiled on behalf of the unboiled, and furthermore Rabban Shimon ben Gamaliel says, wine that is boiled is no longer subject to [the laws regarding] uncovered liquids (Ter. 8:4) or subject to [the laws regarding] wine of libation (Avodah Zarah 30a:5).