Mishnah Bikkurim, the eleventh and final tractate of Seder Zeraim, describes the offering of first fruits and the procession to Jerusalem. Spread across 4 chapters and 39 mishnayot, it completes the list of Zeraim tractates without a Babylonian Gemara — only Berakhot, at the head of the order, has one.
Talmud Bavli