"First-fruits") is the eleventh tractate of Seder Zeraim ("Order of Seeds") of the Mishnah and of the Talmud.
This difference for converts was disagreed with by Rabbi Judah bar Ilai and later Maimonides, and it is their position that has become the practice of the Jewish community.
[1] The third chapter describes more fully the process of bringing the first fruits to the Temple at the festival of Shavuot.
It compares the laws relating to men, women, and those of intermediate sex, including the tumtum (one with no genitalia) and the androgynos.
The Jerusalem Talmud has Gemara on Bikkurim, in which the laws of the Mishnah are discussed in the usual way, with a few digressions, noteworthy among which is that on Leviticus 19:32 "You shall rise before a venerable person and you shall respect the elderly," and on the value of the title "zaken" (elder) conferred on scholars in the Land of Israel and outside the Land (Yerushalmi 3:3, 11a-b or 65c).