How large is the area declared beit hapras when a grave is plowed over?
Halacha 1: A beit hapras extends 100 cubits by 100 cubits from the grave — this is the maximum distance the plowed bones can scatter.
Question 2
Does plowing a field where a grave was merely suspected (not definitely known) create a beit hapras?
Halacha 4: Our Sages decreed beit hapras only for a field where a definitely known grave was plowed. A lost grave, scattered bones, or uncertain situations do not create this status.
Question 3
Rain washes beit hapras earth onto a pure lower field. What is the status of the lower field?
Halacha 7: A beit hapras does not make a second beit hapras. The Sages decreed only on earth in its natural, undisturbed state — once washed away, it loses its beit hapras status.
Question 4
What is the minimum valid method to purify a beit hapras field?
Halacha 12: Three valid methods: (1) sieve all soil through fine mesh and remove barley-sized bones; (2) add 3 handbreadths of clean earth to entire surface; (3) remove 3 handbreadths from entire surface. All require two Torah scholars present.
Question 5
A gentile plows over a grave in his own field. Is the field considered beit hapras?
Halacha 6: When a gentile plows a grave in his field, no beit hapras is created — the concept of beit hapras simply does not apply to gentiles.