AgricultureID

State · US-CA

California

California is dominated by Mediterranean climates — hot-summer (Csa) in the Central Valley and warm-summer (Csb) along the coast — grading into cold semi-arid (BSk) and hot-desert (BWh) conditions in the south and interior. Rain falls mostly in winter, so the long, dry summer growing season depends on irrigation.

Major crop systems

  • Irrigated tree nuts — almonds, walnuts, and pistachios
  • Wine, table, and raisin grapes and citrus
  • Processing tomatoes, rice, cotton, and intensive vegetable and berry horticulture

Major livestock systems

  • Large-scale dairy — the leading dairy state
  • Beef cow–calf and cattle grazing on foothill rangeland
  • Poultry

Agricultural land: The Central Valley (Sacramento and San Joaquin valleys) and the coastal valleys concentrate extraordinarily diverse, high-value cropping on deep alluvial soils; much of the rest of the state is rangeland, desert, or mountains. Irrigation: Irrigation is fundamental: the federal Central Valley Project, the State Water Project, and local districts move Sierra Nevada snowmelt to farms, supplemented — and in drought heavily substituted — by groundwater.

Agroecological zones: Csa (Hot-summer Mediterranean), Csb (Warm-summer Mediterranean), BSk (Cold semi-arid (steppe)), BWh (Hot desert)

Documented crops & livestock

Official institutions

  • California Department of Food and Agriculture (CDFA) — State department for agriculture, animal and plant health, and marketing.
  • University of California Agriculture and Natural Resources (UC ANR) — Statewide land-grant research and cooperative extension.
  • USDA National Agricultural Statistics Service (NASS) — Official state-level crop, livestock, and Census of Agriculture statistics, published through its regional field office network.

Data coverage & limitations

Descriptive profile; subnational statistics for California are published by USDA NASS and the California Department of Food and Agriculture and are not reproduced numerically here.

  • Boundaries and administrative classification follow the ISO 3166-2 subdivision system and USDA/state reporting units.
  • No subnational statistics are reproduced here; any official figures are dated, versioned, and periodically revised — read them with their year and source.
  • Water availability is decisive and highly variable year to year; a snapshot profile does not capture drought cycles, surface-water allocations, or groundwater-sustainability constraints.

Sources

This article draws on the following authoritative sources. See our sources & methodology for how they are selected.

  1. [1]USDA NASS — National Agricultural Statistics Service (opens in a new tab)

    USDA National Agricultural Statistics Service (NASS)

    Authoritative

    Cited for: Official state agricultural statistics

    Type:
    Government agency
    Jurisdiction:
    United States
    Accessed:
    2026-07-12
  2. [2]USDA — U.S. Department of Agriculture (opens in a new tab)

    United States Department of Agriculture (USDA)

    Authoritative

    Cited for: Federal agricultural context

    Type:
    Government agency
    Jurisdiction:
    United States
    Accessed:
    2026-07-12
  3. [3]UC Statewide Integrated Pest Management Program (UC IPM) (opens in a new tab)

    University of California Agriculture and Natural Resources (UC ANR)

    High

    Cited for: California crop production and pest-management context

    Type:
    University extension service
    Jurisdiction:
    United States (California)
    Accessed:
    2026-07-12