World agriculture structure

Adaptation

The sum of changes an animal makes in response to its environment to survive.

Physiological adaptation

Changes in body functions, such as sweating, panting, or altered metabolism.

Behavioral adaptation

Changes in behavior to survive environmental conditions, such as seeking shade, huddling, or migration.

Morphological adaptation

Changes in physical characteristics, such as coat color, body size, or ear size.

Genetic/evolutionary adaptation

Inherited traits that help animals survive, such as heat tolerance in Bos indicus cattle or high-altitude adaptations in yaks and alpacas.

Climatic stress

Environmental stress caused by hot or cold conditions, including direct effects on animals and indirect effects through plants.

Nutritional stress

Stress caused by inadequate feed quantity or quality or limited water availability.

Biological/internal stress

Stress caused by pathogens or toxins entering an animal's body.

Geographical/physical stress

Stress caused by terrain or physical conditions such as high altitude, snow, sand, or swamps.

Social/management stress

Stress associated with interactions among animals, predators, humans, and animal handling.

Heat stress

High-temperature conditions that trigger physiological and behavioral responses and may reduce feed intake, reproduction, immunity, and milk production.

Bos indicus

A cattle species group known for adaptations such as heat tolerance, tick resistance, and drought tolerance.

Tropical climates

Climates characterized by extreme heat and disease challenges for livestock.

Desert climates

Climates with limited rainfall, heat, and wind that challenge livestock production.

Cold environments

Climates with low temperatures where adapted animals such as reindeer and caribou can survive.

Temperate climates

Generally productive agricultural climates common in developed countries.

Tropical rain forest

Tropical region with a rainy season lasting 11 months or more.

Humid tropics

Tropical region with a rainy season lasting 7–11 months.

Semi-humid tropics

Tropical region with a rainy season lasting 4.5–7 months.

Semiarid tropics

Tropical region with a rainy season lasting 2–4.5 months.

Semi-desert to desert

Region with a rainy season lasting 0–2 months.

Transhumance

Seasonal movement of herds between grazing areas.

Nomadism

Opportunistic and unpredictable movement of herds in search of resources.

Social and cultural influences on agriculture

Religious beliefs, animal welfare values, economic development, labor availability, government policies, and markets that shape livestock production.

Halal slaughter

Animal slaughter conducted according to Islamic requirements.

Kosher slaughter

Animal slaughter conducted according to Jewish dietary requirements.

Animal welfare standards

Requirements or practices concerning animal care and housing, including cage-free systems and welfare audits.

Primitive agriculture

Agriculture in which nearly the entire population produces its own food, primarily using hand labor.

Subsistence agriculture

Agriculture in which a large share of the population farms, with little mechanization and extensive hand or animal labor.

Developed agriculture

Highly specialized and mechanized agriculture involving less than 10% of the population in farming.

Low-input production system

A system relying mainly on on-farm resources such as pasture, forage, and family labor, with low investment and relatively low output per animal or acre.

Intensive production system

A highly specialized system using purchased feed, technology, infrastructure, and capital to maximize efficiency, productivity, and profitability.

Confinement facilities

Facilities used to house livestock in intensive production systems.

Capital investment

Money invested in facilities, equipment, technology, and other production resources.

Specialization

Focusing livestock operations on particular species or products to improve efficiency.

Agricultural inputs

Resources used in production, such as land, soil, water, labor, machinery, finance, and technology.

Agricultural processes

Activities such as crop and livestock production, resource use, and technological applications.

Agricultural outputs

Results of production, including goods, services, rural livelihoods, and environmental outcomes.

Shifting cultivation

A primitive agricultural system associated with wetter regions in which cultivation moves between areas.

Rudimentary sedentary tillage

A subsistence production system involving basic cultivation of land in a settled location.

Peasant grain and livestock farming

A subsistence agricultural system combining grain cultivation and livestock production.

Intensive subsistence tillage

A subsistence production system associated with humid regions and intensive cultivation, particularly rice.

Ranching

A livestock production system using land for grazing animals.

Commercial livestock and crop farming

Developed agricultural production of livestock and crops for markets, especially in humid regions.

U.S. dairy industry trend

The number of dairy farms has declined while farms have grown larger, cow numbers have remained relatively stable, and milk production per cow has increased.

Vertical integration

Coordination or control of multiple stages of production, such as breeding, hatching, growing, processing, and distribution.

Poultry production chain

A sequence including breeding stock, pullet farms, breeder farms, hatcheries, broiler farms, processing, and distribution.

Economies of scale in intensive production

Lower production costs per unit of meat, milk, or eggs as operations become more efficient.

Producer challenges in intensive systems

Low profit margins, difficulty entering markets, environmental and biosecurity concerns, and pressure to adopt new technology.

Consolidation

A trend in which relatively few companies account for a large share of livestock production.

Technology treadmill

The continual need for producers to adopt new technology and adapt to remain competitive.

Biosecurity

Measures and concerns related to preventing disease introduction and spread in livestock operations.

RFID

Radio-frequency identification technology used to identify and monitor individual animals.

Biometrics

Measurement and monitoring of animal characteristics to collect real-time information.

Livestock automation

Use of robotics, machinery, and automated systems in animal production.

Carbon footprint

The climate-related greenhouse gas impact of livestock production, which some farms seek to reduce to zero or below.

Animal nomenclature

Standardized terminology for describing animal species, sex, age, production stage, and management.

Dorsal

Toward or nearer the back of an animal.

Ventral

Toward or nearer the belly of an animal.

Cranial

Toward or nearer the head or skull.

Caudal

Toward or nearer the tail.

Proximal

Closer to the body or point of attachment of a limb.

Distal

Farther from the body or point of attachment of a limb.

Medial

Toward the midline of the body.

Lateral

Farther from the midline of the body.

Rostral

Toward the muzzle.

Palmar

Toward the walking surface of the front paw.

Plantar

Toward the walking surface of the hind paw.

Bos

Genus of cattle.

Capra

Genus of goats.

Ovis

Genus of sheep.

Equus

Genus of horses.

Sus

Genus of pigs.

Gallus

Genus of chickens.

Meleagris

Genus of turkeys.

Anas

Genus of ducks.

Herd

Group term for cattle or pigs.

Band

Group term for goats or horses.

Flock

Group term for sheep or poultry.

Bull

Male cattle, either young or mature.

Cow

Mature female bovine, usually after first lactation.

Heifer

Young female bovine from birth through first lactation.

Calf

Young male or female bovine, usually sexually immature.

Steer

Castrated male bovine.

Calving

The process of cattle giving birth.

Beef

Meat from cattle.

Wet calf

Young dairy bovine being fed milk or milk replacer.

Yearling

Male or female animal approximately one year old.

Springing

Heifer or cow in the late stage of pregnancy.

Veal

Meat product from a male calf raised on a milk diet.

Freemartin

Infertile female calf born as a twin to a bull calf.

Stag

Male animal castrated after puberty.

Buck

Male goat.

Doe

Female goat.

Kid

Newborn or young goat.

Wether

Castrated male sheep or goat.

Kidding

The process of a goat giving birth.

Chevon

Meat from goats.

Ram

Male sheep.

Ewe

Female sheep.