Cal. Government Code § 51040.3

For purposes of this chapter, the following terms have the following meanings: (a) “Urban” means an area within the boundaries of an urbanized area, as that term is used by the United States Census Bureau, that includes at least 250,000 people. (b) “Urban Agriculture Incentive Zone” means an area within a county or a city and county that is comprised of individual properties designated as urban agriculture preserves by the county or the city and county for farming purposes. (c) “Agricultural use” means farming in all its branches including, but not limited to, the cultivation and tillage of the soil, the production, cultivation, growing, and harvesting of any agricultural or horticultural products, the raising of livestock, bees, fur-bearing animals, dairy-producing animals, and poultry, agricultural education, the sale of produce through field retail stands or farms stands as defined by Article 5 (commencing with Section 47030) of Chapter 10.5 of Division 17 of the Food and Agricultural Code, and any practices performed by a farmer or on a farm as an incident to or in conjunction with farming operations. For purposes of this chapter, the term “agricultural use” does not include timber production.