Cal. Civ. Code § 9-206.1

Life tenancy termination; farmland leases.
(a) Tenancies from year to year of farmland occupied on a crop share,
livestock share, cash rent, or other rental basis in which the lessor is the
life tenant or the representative of the life tenant shall continue until the
end of the current lease year in which the life tenant's interest terminates
unless otherwise provided in writing by the lessor and the lessee.
(b) Whenever the life tenancy of the lessor terminates not more than 6
months before the end of the tenancy of the lessee but before the
beginning of the next crop year, the lessee of the farmlands is entitled to
reasonable costs incurred in field preparation for the next crop year, payable
by the succeeding life tenant or remainderman.
As used in this Section "farmland" means any property used primarily for the
growing and harvesting of crops; the feeding, breeding and
management of livestock; dairying, or any other agricultural or
horticultural use or combination thereof, including, but not limited to,
hay, grain, fruit, truck or vegetable crops, floriculture, mushroom
growing, plant or tree nurseries, orchards, forestry, sod farming and
greenhouses; the keeping, raising and feeding of livestock or poultry,
including poultry, swine, sheep, beef cattle, ponies or horses; dairy farming;
fur farming; beekeeping; or fish or wildlife farming.