Related על מכשירין 2:11

We [may] combine fruits [grown] outside the Land of Israel with [exempt, i.e., tithed] fruits [grown] inside the Land of Israel so that they form the majority over [Demai fruits grown] in the Land of Israel in order to exempt them from tithes. We [may] combine fruits [grown] outside the Land of Israel with second-year fruits (i.e., fruits grown in the second year of the agricultural cycle), in order that they form the majority over third-year fruits to exempt them from the second tithe. We [may] combine from the fruits [grown] outside the Land of Israel with third-year fruits in order that they form the majority over fourth-year fruits to exempt them from the poor man's tithe. [?] We [may] combine fruits [grown] immediately before Shevi'it [the seventh year of the agricultural cycle, when fields must lie fallow] in order that they form the majority over fruits [grown during] Shevi'it, to exempt them from Bi'ur ["removal," see Sheviit 7:1]. We [may] combine fruits [grown] outside the Land of Israel with Shevi'it fruits in order that they form the majority over fruits [grown] immediately after Shevi'it in order to exempt them from tithes.