Can fruit trees be planted in a field where a grave was lost?
Halacha 3: Fruit trees may not be planted in a field where a grave was lost, because their roots grow deep and reach the corpse — causing continued contamination. Regular seeds whose roots are shallow may be planted.
Question 2
What is the status of the original site of a known grave after the corpse is relocated?
Halacha 5: A known grave that was relocated — its original site becomes pure and permitted for use. But a found grave (whose original designation was unknown) leaves an impure site after relocation, requiring inspection.
Question 3
With what material are graves marked to warn others?
Halacha 8: Graves are marked with lime — mixed and poured over the place of impurity. This practice goes back to the Mishnah and was organized by the courts during Chol HaMoed.
Question 4
A field has all four boundary lines marked with lime. What does this tell us about the field?
Halacha 11: When all four boundaries are marked, the entire field is impure and the boundaries themselves are pure. The reasoning: marks should not be placed far from the actual impurity — so if all boundaries are marked, the impurity must be in the field interior.
Question 5
A meit mitzvah (unclaimed corpse) is found outside the Sabbath limit of a city. Where should it be buried?
Halacha 7: Outside the Sabbath limit, even if found in a valuable field, the meit mitzvah acquires its place and must be buried where it is found.