Mishnayos Kilayim Perek 2 Mishnah 9

קרחת – a free place that is not sown when it is quadrangular like (Leviticus 13:42): "בקרחתו"/”on the bald parr in the front,” which is the hair is plucked (i.e., made bald) and the place is smooth.

עשרים וארבע קרחות לבית סאה – and in every quadrangular patch [that is not sown] he sows one kind/ species. And a Bet Seah/a field requiring one Seah of seed is fifty cubits by fifty cubits, and when you make in it twenty-four patches, it is found that each quadrangular patch is ten cubits and two and one-half handbreadths length by ten cubits width. How so? If you make [in a field] from fifty [cubits] by fifty [cubits] , twenty five quadrangular patches, each quadrangular patch will be ten cubits by ten cubits; take one of them in order that twenty-four quadrangular patches will remain and divide them into twenty-four strips, it is found that each strip will be two and one-half handbreadths wide by a length of ten [handbreadths] for each cubit is six handbreadths which are sixty handbreadths, for ten cubits, give each strip from these at the head of each quadrangular patch, it is found that each quadrangular patch is ten cubits and two-and-one-half handbreadths length by ten cubits width.

מקרחת לבית רובע – For in a Seah there are twenty-four square quarters of a Kab; place them for the twenty-four quadrangular patches so that each quadrangular patch will have one piece of ground of the capacity for one Rova of seed.

כל מין שירצה – but Rabbi Meir did not require distancing a all for since they are quadrangular, they appear as separated and distinguished one from another.

היתה – within the field one quadrangular unsown patch of the capacity for one Rova of seed or wo quadrangular unsown patches.

זורעם חרדל – that it doesn’t appear like a field of mustard within a field of field of grain, but three quadrangular unsown patches appear like a field of mustard within the field of grain, because it is not normal to sow from the mustard a large field. But for the rest of the species, even three quadrangular unsown patches do not appear like a field because they regularly sow from them a lot together.

וחכמים אומרים תשע קרחות מותרות - The Sages are replying to the first clause, for when Rabbi Meir staes that one sows all twenty-four quadrangular unsown patches from any species that he desires, but the Sages prohibit placing one species next to a different species , but rather one makes a Bet Seah/a field requiring one Seah of seed of twenty-five quadrangular unsown patches which are five rows and each row from the five quadrangular unsown patches and he sows the first quadrangular unsown patch of the first row and leaves the second that is next to as fallow ground and he sows the third and leaves the fourth as fallow ground and sows the fifth and leaves the second row entirely as fallow ground and sows from the third row the quadrangular unsown patch and the third and the fifth and leaves the entire fourth row as fallow ground and he sows from the fifth row the first, third and fifth quadrangular unsown patches , there are nine quadrangular unsown patches that are sown for a Bet Seah.

עשר אסורות – that there needs to be a partition/separation between each and every quadrangular unsown patch like the measurement of a quadrangular unsown patch which is the capacity for one Rova of seed in nearness. And the Halakha is according to the Sages.

בית כור – the language of Seahs. But the reason of Rabbi Eliezer ben Yaakov is not explained.