Yerushalmi Bava Metzia 9:2 ירושלמי בבא מציעא ט׳:ב׳

MISHNAH: One who contracts with another for a field¹⁷The nature of the field was not specified in the lease., if it is an irrigated field or an orchard and the source dried up or the orchard was cut down, he¹⁸The tenant. This Mishnah does not apply to sharecroppers. may not deduct from his leasing fee. If he said, this irrigated field or this orchard shall be leased to me¹⁹The nature of the field was specified in the lease. and the source dried up or the orchard was cut down, he may deduct from his leasing fee.

HALAKHAH: “One who contracts with another for a field,” etc. Rebbi Isaac said, if the well dried up completely²⁰This refers to the second case of the Mishnah, where the nature of the area to be leased was specified in the contract. The Babli (103b) points out that the drying up of the water source must be a local phenomenon; for if it were due to a countrywide drought the tenant could reduce his rent payments according to Mishnah 9:6.. But if it was two storeys deep and now it is three storeys deep, one may tell him: exert yourself and it will be sufficient.

“The orchard was cut down.” Rebbi Isaac said, if the entire orchard was cut down. But if there remained ten trees standing per bet se’ah²¹Ten fruit trees per bet se’ah constitute a minimal orchard (Ševi‘it1:2, Note 18), one tree per 250 square cubits. If the trees are more widely spaced, the area legally is no longer an orchard. The statement that “the entire orchard was cut down” has to be qualified to mean that “the trees were cut down to the extent that the orchard no longer exists.” he may tell him: At the beginning they were sickly and were not bearing much. But now they are sparse and will be productive.