Related for Pesachim 69:18

Rabbi Yochanan ben Nuri says, even with keramit (a type of wild wheat, see Pes. 35a:11, Steinsaltz tr.) does a person fulfill his obligation [to eat unleavened bread] on Passover. They fulfill [their obligation] with second tithe in Jerusalem but not with first fruits. What is the difference between second tithe and first fruits? Second tithe is permitted to eat in the outlying areas, but first fruits are not permitted to eat in the outlying areas.