Kilayim 2:1 - 2:2

כל סאה שיש בה רבע – The Kab (=1/6 of a Seah or 24 egg bulks) which is one in twenty-four parts of a Seah, and the Seah is six Kabim.

ימעט - [he shall diminish/reduce] that other species that is mixed in it until the quarter [of a Kab] would be diminished and will be nullified within the Seah and he would be permitted to sow and not be prohibited because of sowing a forbidden junction of heterogeneous plants in the same field.

יבור – for since it was necessary to diminish, he removes everything, because I appears like he is establishing a forbidden junction of heterogeneous plants/diverse kinds in the same field, for since he began to sift, if he would not sift everything. But if at its outside it is less than one-quarter [of a Kab] it is permitted. But the Halakha is not according to Rabbi Yossi.

בין ממין אחד – whether in that ssame quarter from one species or whether from many species, he must diminish/reduce it.

לא אמרו אלא ממן אחד – for two species do not combine to the measurement of a quarter [of a Kab].

וחכמים אומרים כל שהוא כלאים לסאה – there is [a difference] between the Sages and the first Tanna/teacher [of the Mishnah] as for example, a Seah of barley that has in it a quarter [of a Kab] of oats and spelt, [according] to the first Tanna/teacher, one needs to diminish it; to the Sages, oe does not have to diminish it, for oats do not combine with spelt since they are not diverse kinds in the Seah of barley. And the Halakha is according to the Sages.

במה דברים אמורים תבואה בתבואה – grain [is mixed] with a species of grain or pulse that we said in one-fourth of a Kab per Seah, he should diminish/reduce it, but garden seeds [which are not used for food (i.e., seeds of vegetables) that were combined/mixed with grain or pulse [combine to form an amount sufficient to prohibit the sowing of the Seah].

מעשרים וארבע בנופל – from them to the Bet Seah (i.e., 50 cubits by 50 cubits/2500 square cubits) of wheat, that is to say, according to the measure of seed that they sow from them for the place that they sow in it a Seah of wheat. And the measure of the place that they sow a Seah of wheat is fifty cubits by fifty cubits but they don’t sow in it from the seeds of a garden other than a Kab and one-half because they are thin, and a Kab and one-half from them there is sufficient to sow a place that they sow a Seah of wheat. It is found that according to this calculation, that if it was mixed in one Seah of grain or pulse or rows of plants in one bed (i.e., seeds) which are one-in twenty-four of a Kab and an a half from garden seeds which is one of sixteen in a Kab, it is necessary to diminish/reduce them. Therefore, if there was combined in a Seah of grain the volume of an egg and half of garden seeds, which is one out of twenty-four of a Kab and one-half of a Kab, he must reduce it.

כשם שאמרו להחמיר – that thin seeds prohibit in a small measurement with one in twenty-four which fall from them into a Bet Seah (i.e., 2500 square cubits), such they said to be lenient for thick seeds that require many of them to sow in a Bet Seah do not forbid in a Seah of wheat other than one in twenty-four when it falls from them into a Beth Seah, such as seed of flax that requires three Seah for a Bet Seah of wheat, there is no need to diminish it until it combines with them three-fourth [a Kab] in a Seah, which means that it is taught that the flax in the grain combines one in twenty-four when it falls into a Bet Seah, and since three Seah falls from them into a Bet Seah, and we state in the Jerusalem Talmud that it is found that there is no need to reduce it until there would combine from them three-foruths of a Kab into the Seah, and such is the Halakha.