When sowing rows of zucchini, squash, and Egyptian beans next to each other with trenches between them, what is the minimum number of rows of each species that must be planted together?
Halacha 1 explicitly states that two rows of zucchini, two rows of squash, and two rows of Egyptian beans may be sown next to each other with a trench between each species. Sowing only one row of each is forbidden because the leaves of these long-leafed species would become tangled and appear intermingled.
Question 2
When planting rows of squash within a field of other vegetables, how many cubits of vegetables must separate each two rows of squash?
Halacha 2 rules that twelve cubits of vegetables must remain between each two rows of squash. If less than this measure is left, the leaves of the squash will tangle with the vegetables on either side and the entire field will appear as a forbidden mixture.
Question 3
In the six-handbreadth-by-six-handbreadth row system described in Halacha 9, how many different vegetable species may be sown, and what is the arrangement?
Halacha 9 specifies exactly five species: four sown at the four sides (corners) of the six-by-six handbreadth row and one in the middle, with a handbreadth-and-a-half separating each species. Sowing more than five is forbidden even with proper separation, because it would appear as a mixture.
Question 4
According to Halacha 12, how many species may be sown in a six-handbreadth row that has a barrier one handbreadth high and one handbreadth wide around it?
Halacha 12 rules that with a one-handbreadth-high, one-handbreadth-wide barrier surrounding the row, eighteen species may be sown: three on each side of the barrier (four sides = twelve) and six in the middle. The species on the barrier are considered distinct from those inside. Turnips may not be sown on the barrier lest they grow and fill it.
Question 5
What is the ruling in Halacha 16 regarding the two operative concerns of kilayim law — physical spacing and visual distinction?
Halacha 16 explicitly synthesizes the entire chapter: when sufficient space (a handbreadth-and-a-half) exists between two species so they do not derive nurture from each other, we are not concerned with appearance. Conversely, when species appear separate from each other, we are not concerned with the fact that they derive nurture from each other even if adjacent. Each condition independently permits the planting.